/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:23:08,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:23:08,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:23:08,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:23:08,604 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.epf [2021-06-05 05:23:08,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:23:08,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:23:08,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:23:08,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:23:08,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:23:08,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:23:08,621 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:23:08,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:23:08,621 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:23:08,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:23:08,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:23:08,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:23:08,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:23:08,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:23:08,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:23:08,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:23:08,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:23:08,622 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:23:08,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:23:08,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:23:08,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:23:08,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:23:08,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:23:08,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:23:08,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:23:08,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:23:08,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:23:08,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:23:08,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:23:08,624 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:23:08,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:23:08,624 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:23:08,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:23:08,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:23:08,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:23:08,874 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:23:08,876 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:23:08,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl [2021-06-05 05:23:08,885 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl' [2021-06-05 05:23:08,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:23:08,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:23:08,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:23:08,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:23:08,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:23:08,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:23:08" (1/1) ... [2021-06-05 05:23:08,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:23:08" (1/1) ... [2021-06-05 05:23:08,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:23:08,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:23:08,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:23:08,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:23:08,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:23:08" (1/1) ... [2021-06-05 05:23:08,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:23:08" (1/1) ... [2021-06-05 05:23:08,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:23:08" (1/1) ... [2021-06-05 05:23:08,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:23:08" (1/1) ... [2021-06-05 05:23:08,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:23:08" (1/1) ... [2021-06-05 05:23:08,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:23:08" (1/1) ... [2021-06-05 05:23:08,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:23:08" (1/1) ... [2021-06-05 05:23:08,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:23:08,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:23:08,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:23:08,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:23:08,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:23:08" (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 05:23:09,007 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:23:09,007 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:23:09,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:23:09,008 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:23:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:23:09,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:23:09,008 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:23:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:23:09,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:23:09,009 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 05:23:09,196 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:23:09,197 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 05:23:09,197 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 05:23:09,198 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:23:09 BoogieIcfgContainer [2021-06-05 05:23:09,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:23:09,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:23:09,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:23:09,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:23:09,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:23:08" (1/2) ... [2021-06-05 05:23:09,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f62f0f and model type channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:23:09, skipping insertion in model container [2021-06-05 05:23:09,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:23:09" (2/2) ... [2021-06-05 05:23:09,203 INFO L111 eAbstractionObserver]: Analyzing ICFG channel-sum.wvr.bpl [2021-06-05 05:23:09,206 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:23:09,206 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:23:09,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:23:09,207 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:23:09,273 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 05:23:09,287 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 05:23:09,314 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:23:09,314 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:23:09,314 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:23:09,314 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:23:09,314 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:23:09,314 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:23:09,321 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:23:09,321 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:23:09,329 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 26 places, 22 transitions, 60 flow [2021-06-05 05:23:09,338 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 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 05:23:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 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 05:23:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 05:23:09,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:09,344 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:09,344 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash 10984786, now seen corresponding path program 1 times [2021-06-05 05:23:09,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:09,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767529753] [2021-06-05 05:23:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:09,469 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 05:23:09,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:09,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767529753] [2021-06-05 05:23:09,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767529753] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:23:09,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:23:09,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:23:09,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056853586] [2021-06-05 05:23:09,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:23:09,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:09,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:23:09,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:23:09,486 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 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) 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 05:23:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:09,508 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2021-06-05 05:23:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:23:09,509 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 05:23:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:09,516 INFO L225 Difference]: With dead ends: 54 [2021-06-05 05:23:09,517 INFO L226 Difference]: Without dead ends: 42 [2021-06-05 05:23:09,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:23:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-05 05:23:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-06-05 05:23:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 70 transitions. [2021-06-05 05:23:09,547 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 70 transitions. Word has length 11 [2021-06-05 05:23:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:09,548 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 70 transitions. [2021-06-05 05:23:09,548 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 05:23:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 70 transitions. [2021-06-05 05:23:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 05:23:09,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:09,549 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:09,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:23:09,550 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:09,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1844506957, now seen corresponding path program 1 times [2021-06-05 05:23:09,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:09,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795351509] [2021-06-05 05:23:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:09,577 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 05:23:09,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:09,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795351509] [2021-06-05 05:23:09,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795351509] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:23:09,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:23:09,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:23:09,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114854024] [2021-06-05 05:23:09,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:23:09,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:09,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:23:09,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:23:09,579 INFO L87 Difference]: Start difference. First operand 36 states and 70 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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 05:23:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:09,587 INFO L93 Difference]: Finished difference Result 37 states and 68 transitions. [2021-06-05 05:23:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:23:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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 05:23:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:09,592 INFO L225 Difference]: With dead ends: 37 [2021-06-05 05:23:09,592 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 05:23:09,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:23:09,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 05:23:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-05 05:23:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-06-05 05:23:09,596 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 13 [2021-06-05 05:23:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:09,597 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-06-05 05:23:09,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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 05:23:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-06-05 05:23:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 05:23:09,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:09,597 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:09,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:23:09,598 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash 244145385, now seen corresponding path program 1 times [2021-06-05 05:23:09,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:09,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632175351] [2021-06-05 05:23:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:09,662 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 05:23:09,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:09,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632175351] [2021-06-05 05:23:09,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632175351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:09,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649806586] [2021-06-05 05:23:09,663 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 05:23:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:09,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:23:09,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:09,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:23:09,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:09,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:09,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:09,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-05 05:23:09,880 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 05:23:09,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649806586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:09,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:09,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:23:09,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900064371] [2021-06-05 05:23:09,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:23:09,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:09,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:23:09,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:23:09,881 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 05:23:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:09,924 INFO L93 Difference]: Finished difference Result 67 states and 134 transitions. [2021-06-05 05:23:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:23:09,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 05:23:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:09,925 INFO L225 Difference]: With dead ends: 67 [2021-06-05 05:23:09,925 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 05:23:09,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:23:09,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 05:23:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-06-05 05:23:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 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 05:23:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 89 transitions. [2021-06-05 05:23:09,930 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 89 transitions. Word has length 16 [2021-06-05 05:23:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:09,930 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 89 transitions. [2021-06-05 05:23:09,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 05:23:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 89 transitions. [2021-06-05 05:23:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 05:23:09,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:09,930 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:10,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 05:23:10,145 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:10,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:10,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1749319479, now seen corresponding path program 1 times [2021-06-05 05:23:10,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:10,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589513691] [2021-06-05 05:23:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:10,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589513691] [2021-06-05 05:23:10,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589513691] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:23:10,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:23:10,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:23:10,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210590362] [2021-06-05 05:23:10,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:23:10,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:10,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:23:10,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:23:10,159 INFO L87 Difference]: Start difference. First operand 46 states and 89 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 05:23:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:10,164 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-06-05 05:23:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:23:10,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 05:23:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:10,165 INFO L225 Difference]: With dead ends: 52 [2021-06-05 05:23:10,165 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 05:23:10,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:23:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 05:23:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-06-05 05:23:10,168 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 05:23:10,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-06-05 05:23:10,169 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 16 [2021-06-05 05:23:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:10,169 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-06-05 05:23:10,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 05:23:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-06-05 05:23:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:23:10,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:10,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:10,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:23:10,170 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:10,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:10,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1115470710, now seen corresponding path program 2 times [2021-06-05 05:23:10,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:10,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519539737] [2021-06-05 05:23:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:10,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:10,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519539737] [2021-06-05 05:23:10,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519539737] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:23:10,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:23:10,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:23:10,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114056735] [2021-06-05 05:23:10,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:23:10,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:10,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:23:10,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:23:10,199 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 05:23:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:10,211 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-06-05 05:23:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:23:10,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 18 [2021-06-05 05:23:10,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:10,212 INFO L225 Difference]: With dead ends: 116 [2021-06-05 05:23:10,212 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 05:23:10,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:23:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 05:23:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-06-05 05:23:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.104651162790698) internal successors, (181), 86 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 181 transitions. [2021-06-05 05:23:10,222 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 181 transitions. Word has length 18 [2021-06-05 05:23:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:10,222 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 181 transitions. [2021-06-05 05:23:10,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 05:23:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 181 transitions. [2021-06-05 05:23:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:23:10,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:10,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:10,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 05:23:10,223 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:10,225 INFO L82 PathProgramCache]: Analyzing trace with hash -686636110, now seen corresponding path program 3 times [2021-06-05 05:23:10,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:10,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560370848] [2021-06-05 05:23:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:10,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:10,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560370848] [2021-06-05 05:23:10,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560370848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:10,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330537922] [2021-06-05 05:23:10,247 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 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 05:23:10,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:23:10,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:10,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:23:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:10,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330537922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:10,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:10,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:23:10,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295950333] [2021-06-05 05:23:10,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:23:10,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:10,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:23:10,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:23:10,309 INFO L87 Difference]: Start difference. First operand 87 states and 181 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 05:23:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:10,324 INFO L93 Difference]: Finished difference Result 118 states and 228 transitions. [2021-06-05 05:23:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:23:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 21 [2021-06-05 05:23:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:10,334 INFO L225 Difference]: With dead ends: 118 [2021-06-05 05:23:10,334 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 05:23:10,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:23:10,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 05:23:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2021-06-05 05:23:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 213 transitions. [2021-06-05 05:23:10,340 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 213 transitions. Word has length 21 [2021-06-05 05:23:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:10,340 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 213 transitions. [2021-06-05 05:23:10,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 05:23:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 213 transitions. [2021-06-05 05:23:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:23:10,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:10,341 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:10,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:10,542 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:10,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1614866322, now seen corresponding path program 1 times [2021-06-05 05:23:10,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:10,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161616441] [2021-06-05 05:23:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:10,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:10,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161616441] [2021-06-05 05:23:10,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161616441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:10,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552230033] [2021-06-05 05:23:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:23:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:10,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:23:10,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:10,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:10,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:10,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:10,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 05:23:10,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:10,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:10,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:10,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-06-05 05:23:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:10,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552230033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:10,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:10,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:23:10,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202485504] [2021-06-05 05:23:10,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:23:10,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:10,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:23:10,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:23:10,991 INFO L87 Difference]: Start difference. First operand 104 states and 213 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 05:23:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:11,064 INFO L93 Difference]: Finished difference Result 175 states and 364 transitions. [2021-06-05 05:23:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:23:11,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21 [2021-06-05 05:23:11,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:11,069 INFO L225 Difference]: With dead ends: 175 [2021-06-05 05:23:11,069 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 05:23:11,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:23:11,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 05:23:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 119. [2021-06-05 05:23:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 118 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 242 transitions. [2021-06-05 05:23:11,085 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 242 transitions. Word has length 21 [2021-06-05 05:23:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:11,085 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 242 transitions. [2021-06-05 05:23:11,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 05:23:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 242 transitions. [2021-06-05 05:23:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:23:11,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:11,086 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:11,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:11,287 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:11,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:11,287 INFO L82 PathProgramCache]: Analyzing trace with hash 466490442, now seen corresponding path program 2 times [2021-06-05 05:23:11,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:11,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72065441] [2021-06-05 05:23:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:11,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:11,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72065441] [2021-06-05 05:23:11,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72065441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:11,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545465095] [2021-06-05 05:23:11,393 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 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 05:23:11,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:11,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:11,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:23:11,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:11,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:11,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:11,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 05:23:11,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:11,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:11,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:11,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-06-05 05:23:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:11,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545465095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:11,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:11,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:23:11,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495954130] [2021-06-05 05:23:11,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:23:11,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:11,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:23:11,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:23:11,582 INFO L87 Difference]: Start difference. First operand 119 states and 242 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 05:23:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:11,649 INFO L93 Difference]: Finished difference Result 209 states and 432 transitions. [2021-06-05 05:23:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:23:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21 [2021-06-05 05:23:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:11,650 INFO L225 Difference]: With dead ends: 209 [2021-06-05 05:23:11,650 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 05:23:11,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:23:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 05:23:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 123. [2021-06-05 05:23:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.040983606557377) internal successors, (249), 122 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 249 transitions. [2021-06-05 05:23:11,655 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 249 transitions. Word has length 21 [2021-06-05 05:23:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:11,655 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 249 transitions. [2021-06-05 05:23:11,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 05:23:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 249 transitions. [2021-06-05 05:23:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:23:11,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:11,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:11,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:11,873 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:11,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash -870312972, now seen corresponding path program 3 times [2021-06-05 05:23:11,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:11,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364206976] [2021-06-05 05:23:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:11,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:11,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364206976] [2021-06-05 05:23:11,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364206976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:11,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719607711] [2021-06-05 05:23:11,965 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 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 05:23:11,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:23:11,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:11,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:23:11,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:12,070 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:23:12,071 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 05:23:12,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:12,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:12,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:12,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 05:23:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:12,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719607711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:12,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:12,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:23:12,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572082284] [2021-06-05 05:23:12,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:23:12,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:12,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:23:12,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:23:12,087 INFO L87 Difference]: Start difference. First operand 123 states and 249 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 05:23:12,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:12,165 INFO L93 Difference]: Finished difference Result 180 states and 370 transitions. [2021-06-05 05:23:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:23:12,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 05:23:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:12,167 INFO L225 Difference]: With dead ends: 180 [2021-06-05 05:23:12,167 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 05:23:12,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:23:12,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 05:23:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2021-06-05 05:23:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.046511627906977) internal successors, (264), 129 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 05:23:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 264 transitions. [2021-06-05 05:23:12,182 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 264 transitions. Word has length 21 [2021-06-05 05:23:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:12,182 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 264 transitions. [2021-06-05 05:23:12,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 05:23:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 264 transitions. [2021-06-05 05:23:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:12,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:12,186 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:12,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:12,401 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:12,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1631872213, now seen corresponding path program 4 times [2021-06-05 05:23:12,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:12,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021268611] [2021-06-05 05:23:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:12,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:12,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021268611] [2021-06-05 05:23:12,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021268611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:12,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577540442] [2021-06-05 05:23:12,426 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 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 05:23:12,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:12,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:12,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:23:12,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:12,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577540442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:12,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:12,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:23:12,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70145726] [2021-06-05 05:23:12,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:23:12,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:23:12,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:23:12,515 INFO L87 Difference]: Start difference. First operand 130 states and 264 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 05:23:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:12,529 INFO L93 Difference]: Finished difference Result 267 states and 530 transitions. [2021-06-05 05:23:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:23:12,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 23 [2021-06-05 05:23:12,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:12,530 INFO L225 Difference]: With dead ends: 267 [2021-06-05 05:23:12,530 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 05:23:12,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:23:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 05:23:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 163. [2021-06-05 05:23:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.0925925925925926) internal successors, (339), 162 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:12,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 339 transitions. [2021-06-05 05:23:12,534 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 339 transitions. Word has length 23 [2021-06-05 05:23:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:12,534 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 339 transitions. [2021-06-05 05:23:12,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 05:23:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 339 transitions. [2021-06-05 05:23:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:12,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:12,535 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:12,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:12,737 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash 979925673, now seen corresponding path program 5 times [2021-06-05 05:23:12,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:12,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825716188] [2021-06-05 05:23:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:23:12,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:12,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825716188] [2021-06-05 05:23:12,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825716188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:12,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156274668] [2021-06-05 05:23:12,921 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 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 05:23:12,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:23:12,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:12,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:12,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:13,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:13,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:13,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:13,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:13,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:13,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:13,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 05:23:13,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:13,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:13,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:13,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 05:23:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:13,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156274668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:13,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:13,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:23:13,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670181481] [2021-06-05 05:23:13,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:23:13,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:13,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:23:13,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:23:13,227 INFO L87 Difference]: Start difference. First operand 163 states and 339 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:13,366 INFO L93 Difference]: Finished difference Result 337 states and 691 transitions. [2021-06-05 05:23:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:23:13,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:23:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:13,367 INFO L225 Difference]: With dead ends: 337 [2021-06-05 05:23:13,367 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 05:23:13,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 05:23:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 202. [2021-06-05 05:23:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0696517412935322) internal successors, (416), 201 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 05:23:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 416 transitions. [2021-06-05 05:23:13,371 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 416 transitions. Word has length 26 [2021-06-05 05:23:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:13,372 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 416 transitions. [2021-06-05 05:23:13,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 416 transitions. [2021-06-05 05:23:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:13,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:13,372 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:13,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:13,592 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:13,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:13,592 INFO L82 PathProgramCache]: Analyzing trace with hash -494046431, now seen corresponding path program 6 times [2021-06-05 05:23:13,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:13,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671988965] [2021-06-05 05:23:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:13,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:13,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671988965] [2021-06-05 05:23:13,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671988965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:13,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364077638] [2021-06-05 05:23:13,735 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 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 05:23:13,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:23:13,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:13,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:13,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:13,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:13,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:13,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:13,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:13,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:13,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 05:23:13,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:13,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:13,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:13,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 05:23:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:13,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364077638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:13,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:13,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:23:13,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001109726] [2021-06-05 05:23:13,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:13,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:13,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:13,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:13,972 INFO L87 Difference]: Start difference. First operand 202 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:14,107 INFO L93 Difference]: Finished difference Result 375 states and 785 transitions. [2021-06-05 05:23:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:23:14,108 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:23:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:14,109 INFO L225 Difference]: With dead ends: 375 [2021-06-05 05:23:14,109 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 05:23:14,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 05:23:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 214. [2021-06-05 05:23:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.056338028169014) internal successors, (438), 213 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 438 transitions. [2021-06-05 05:23:14,113 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 438 transitions. Word has length 26 [2021-06-05 05:23:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:14,114 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 438 transitions. [2021-06-05 05:23:14,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 438 transitions. [2021-06-05 05:23:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:14,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:14,114 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:14,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 05:23:14,329 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:14,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:14,329 INFO L82 PathProgramCache]: Analyzing trace with hash 960569099, now seen corresponding path program 7 times [2021-06-05 05:23:14,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:14,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952721273] [2021-06-05 05:23:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:14,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:14,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952721273] [2021-06-05 05:23:14,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952721273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:14,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132768677] [2021-06-05 05:23:14,477 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 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 05:23:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:14,501 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:14,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:14,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:14,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:14,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:14,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:14,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 05:23:14,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:14,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:14,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:14,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 05:23:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:14,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132768677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:14,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:14,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:23:14,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29711085] [2021-06-05 05:23:14,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:14,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:14,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:14,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:14,719 INFO L87 Difference]: Start difference. First operand 214 states and 438 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:14,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:14,836 INFO L93 Difference]: Finished difference Result 372 states and 766 transitions. [2021-06-05 05:23:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:23:14,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:23:14,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:14,838 INFO L225 Difference]: With dead ends: 372 [2021-06-05 05:23:14,838 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 05:23:14,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 05:23:14,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 217. [2021-06-05 05:23:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0555555555555554) internal successors, (444), 216 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 444 transitions. [2021-06-05 05:23:14,844 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 444 transitions. Word has length 26 [2021-06-05 05:23:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:14,844 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 444 transitions. [2021-06-05 05:23:14,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 444 transitions. [2021-06-05 05:23:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:14,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:14,845 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:15,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:15,061 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:15,061 INFO L82 PathProgramCache]: Analyzing trace with hash -30244623, now seen corresponding path program 8 times [2021-06-05 05:23:15,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:15,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737018918] [2021-06-05 05:23:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:23:15,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:15,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737018918] [2021-06-05 05:23:15,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737018918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:15,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137857678] [2021-06-05 05:23:15,199 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 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 05:23:15,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:15,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:15,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:15,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:15,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:15,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:15,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:15,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:15,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:15,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:15,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 05:23:15,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:15,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:15,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:15,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 05:23:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:15,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137857678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:15,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:15,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:23:15,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340174262] [2021-06-05 05:23:15,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:23:15,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:15,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:23:15,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:23:15,442 INFO L87 Difference]: Start difference. First operand 217 states and 444 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:15,570 INFO L93 Difference]: Finished difference Result 548 states and 1112 transitions. [2021-06-05 05:23:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:23:15,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:23:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:15,571 INFO L225 Difference]: With dead ends: 548 [2021-06-05 05:23:15,571 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 05:23:15,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 05:23:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 247. [2021-06-05 05:23:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.024390243902439) internal successors, (498), 246 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 05:23:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 498 transitions. [2021-06-05 05:23:15,577 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 498 transitions. Word has length 26 [2021-06-05 05:23:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:15,577 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 498 transitions. [2021-06-05 05:23:15,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 498 transitions. [2021-06-05 05:23:15,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:15,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:15,577 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:15,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:15,793 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:15,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:15,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1504216727, now seen corresponding path program 9 times [2021-06-05 05:23:15,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:15,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409488470] [2021-06-05 05:23:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:15,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:15,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409488470] [2021-06-05 05:23:15,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409488470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:15,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401715591] [2021-06-05 05:23:15,958 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 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 05:23:15,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:23:15,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:15,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:23:15,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:16,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:16,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:16,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:16,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:16,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:16,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:16,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 05:23:16,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:16,227 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-06-05 05:23:16,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:16,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:10 [2021-06-05 05:23:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:16,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401715591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:16,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:16,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:23:16,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626556021] [2021-06-05 05:23:16,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:16,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:16,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:16,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:16,238 INFO L87 Difference]: Start difference. First operand 247 states and 498 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:16,578 INFO L93 Difference]: Finished difference Result 598 states and 1212 transitions. [2021-06-05 05:23:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:16,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:23:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:16,579 INFO L225 Difference]: With dead ends: 598 [2021-06-05 05:23:16,579 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 05:23:16,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 346.0ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 05:23:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 235. [2021-06-05 05:23:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-06-05 05:23:16,584 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-06-05 05:23:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:16,584 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-06-05 05:23:16,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:16,585 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-06-05 05:23:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:16,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:16,585 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:16,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:23:16,798 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash -49601197, now seen corresponding path program 10 times [2021-06-05 05:23:16,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:16,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598789124] [2021-06-05 05:23:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:16,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:16,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598789124] [2021-06-05 05:23:16,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598789124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:16,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059501247] [2021-06-05 05:23:16,917 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 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 05:23:16,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:16,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:16,940 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:16,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:17,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:17,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:17,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:17,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:17,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:17,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 05:23:17,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:17,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:17,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:17,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 05:23:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:17,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059501247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:17,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:17,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:23:17,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917652129] [2021-06-05 05:23:17,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:17,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:17,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:17,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:17,158 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:17,344 INFO L93 Difference]: Finished difference Result 470 states and 964 transitions. [2021-06-05 05:23:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:23:17,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:23:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:17,345 INFO L225 Difference]: With dead ends: 470 [2021-06-05 05:23:17,345 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 05:23:17,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 05:23:17,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-06-05 05:23:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-06-05 05:23:17,351 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-06-05 05:23:17,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:17,351 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-06-05 05:23:17,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:17,351 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-06-05 05:23:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:17,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:17,352 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:17,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:23:17,557 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:17,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:17,558 INFO L82 PathProgramCache]: Analyzing trace with hash 802414539, now seen corresponding path program 11 times [2021-06-05 05:23:17,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:17,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481405015] [2021-06-05 05:23:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:17,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:17,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481405015] [2021-06-05 05:23:17,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481405015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:17,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138331570] [2021-06-05 05:23:17,705 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 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 05:23:17,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:23:17,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:17,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:17,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:17,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:17,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:17,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:17,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:17,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:17,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:17,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:17,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 05:23:17,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:17,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:17,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:17,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 05:23:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:17,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138331570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:17,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:17,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:23:17,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882201482] [2021-06-05 05:23:17,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:17,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:17,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:17,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:17,938 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:18,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:18,112 INFO L93 Difference]: Finished difference Result 414 states and 855 transitions. [2021-06-05 05:23:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:23:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:23:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:18,113 INFO L225 Difference]: With dead ends: 414 [2021-06-05 05:23:18,113 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 05:23:18,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:18,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 05:23:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 245. [2021-06-05 05:23:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.05327868852459) internal successors, (501), 244 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 05:23:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 501 transitions. [2021-06-05 05:23:18,118 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 501 transitions. Word has length 26 [2021-06-05 05:23:18,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:18,118 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 501 transitions. [2021-06-05 05:23:18,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:18,118 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 501 transitions. [2021-06-05 05:23:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:18,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:18,119 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:18,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:23:18,335 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:18,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:18,335 INFO L82 PathProgramCache]: Analyzing trace with hash 509590407, now seen corresponding path program 12 times [2021-06-05 05:23:18,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:18,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973220631] [2021-06-05 05:23:18,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:23:18,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:18,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973220631] [2021-06-05 05:23:18,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973220631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:18,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564653228] [2021-06-05 05:23:18,457 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 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 05:23:18,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:23:18,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:18,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:18,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:18,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:18,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:18,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:18,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:18,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 05:23:18,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:18,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:18,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:18,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 05:23:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:18,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564653228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:18,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:18,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 05:23:18,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218980618] [2021-06-05 05:23:18,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:23:18,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:18,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:23:18,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:23:18,666 INFO L87 Difference]: Start difference. First operand 245 states and 501 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 05:23:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:18,912 INFO L93 Difference]: Finished difference Result 610 states and 1221 transitions. [2021-06-05 05:23:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:23:18,913 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 26 [2021-06-05 05:23:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:18,914 INFO L225 Difference]: With dead ends: 610 [2021-06-05 05:23:18,914 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 05:23:18,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:23:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 05:23:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 293. [2021-06-05 05:23:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 292 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 05:23:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-06-05 05:23:18,919 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 26 [2021-06-05 05:23:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:18,919 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-06-05 05:23:18,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 05:23:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-06-05 05:23:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:18,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:18,920 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:19,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:19,133 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash -964381697, now seen corresponding path program 13 times [2021-06-05 05:23:19,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:19,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185241908] [2021-06-05 05:23:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:19,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:19,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185241908] [2021-06-05 05:23:19,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185241908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:19,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275675161] [2021-06-05 05:23:19,255 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:23:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:19,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:19,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:19,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:19,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:19,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:19,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:19,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 05:23:19,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:19,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:19,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:19,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 05:23:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:19,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275675161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:19,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:19,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:23:19,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169160340] [2021-06-05 05:23:19,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:23:19,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:19,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:23:19,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:23:19,472 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 05:23:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:19,651 INFO L93 Difference]: Finished difference Result 634 states and 1305 transitions. [2021-06-05 05:23:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:23:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 26 [2021-06-05 05:23:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:19,660 INFO L225 Difference]: With dead ends: 634 [2021-06-05 05:23:19,660 INFO L226 Difference]: Without dead ends: 581 [2021-06-05 05:23:19,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-05 05:23:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 290. [2021-06-05 05:23:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-06-05 05:23:19,665 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-06-05 05:23:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:19,665 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-06-05 05:23:19,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 05:23:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-06-05 05:23:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:19,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:19,666 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:19,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:19,881 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:19,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:19,881 INFO L82 PathProgramCache]: Analyzing trace with hash 490233833, now seen corresponding path program 14 times [2021-06-05 05:23:19,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:19,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328122508] [2021-06-05 05:23:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:20,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:20,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328122508] [2021-06-05 05:23:20,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328122508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:20,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517496771] [2021-06-05 05:23:20,000 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:23:20,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:20,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:20,042 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:20,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:20,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:20,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 05:23:20,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:20,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:20,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:20,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 05:23:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:20,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517496771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:20,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:20,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:23:20,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153702688] [2021-06-05 05:23:20,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:23:20,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:20,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:23:20,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:23:20,235 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 05:23:20,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:20,460 INFO L93 Difference]: Finished difference Result 541 states and 1096 transitions. [2021-06-05 05:23:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:23:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 26 [2021-06-05 05:23:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:20,462 INFO L225 Difference]: With dead ends: 541 [2021-06-05 05:23:20,462 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 05:23:20,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:20,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 05:23:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-06-05 05:23:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-06-05 05:23:20,467 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-06-05 05:23:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:20,467 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-06-05 05:23:20,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 05:23:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-06-05 05:23:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:20,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:20,468 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:20,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:20,684 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:20,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:20,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1342249569, now seen corresponding path program 15 times [2021-06-05 05:23:20,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:20,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057592404] [2021-06-05 05:23:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:20,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:20,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057592404] [2021-06-05 05:23:20,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057592404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:20,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565543985] [2021-06-05 05:23:20,814 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 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 05:23:20,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:23:20,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:20,837 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:20,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:21,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:21,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:21,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 05:23:21,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:21,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:21,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:21,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 05:23:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:21,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565543985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:21,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:21,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:23:21,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156562713] [2021-06-05 05:23:21,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:23:21,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:21,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:23:21,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:23:21,029 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 05:23:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:21,268 INFO L93 Difference]: Finished difference Result 524 states and 1067 transitions. [2021-06-05 05:23:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:23:21,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 26 [2021-06-05 05:23:21,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:21,270 INFO L225 Difference]: With dead ends: 524 [2021-06-05 05:23:21,270 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 05:23:21,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 05:23:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 272. [2021-06-05 05:23:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.992619926199262) internal successors, (540), 271 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 05:23:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 540 transitions. [2021-06-05 05:23:21,275 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 540 transitions. Word has length 26 [2021-06-05 05:23:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:21,275 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 540 transitions. [2021-06-05 05:23:21,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 05:23:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 540 transitions. [2021-06-05 05:23:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:23:21,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:21,275 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:21,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 05:23:21,489 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:21,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:21,489 INFO L82 PathProgramCache]: Analyzing trace with hash -931564597, now seen corresponding path program 16 times [2021-06-05 05:23:21,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:21,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171910244] [2021-06-05 05:23:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:21,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:21,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171910244] [2021-06-05 05:23:21,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171910244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:21,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539274250] [2021-06-05 05:23:21,622 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 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 05:23:21,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:21,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:21,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:21,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:21,775 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:23:21,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 05:23:21,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:21,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:21,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:21,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 05:23:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:21,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539274250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:21,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:21,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:23:21,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923532758] [2021-06-05 05:23:21,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:23:21,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:21,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:23:21,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:23:21,789 INFO L87 Difference]: Start difference. First operand 272 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 05:23:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:21,988 INFO L93 Difference]: Finished difference Result 369 states and 744 transitions. [2021-06-05 05:23:21,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:23:21,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 26 [2021-06-05 05:23:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:21,989 INFO L225 Difference]: With dead ends: 369 [2021-06-05 05:23:21,989 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 05:23:21,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 05:23:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 279. [2021-06-05 05:23:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.9964028776978417) internal successors, (555), 278 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 05:23:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 555 transitions. [2021-06-05 05:23:21,993 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 555 transitions. Word has length 26 [2021-06-05 05:23:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:21,993 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 555 transitions. [2021-06-05 05:23:21,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 05:23:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 555 transitions. [2021-06-05 05:23:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:23:21,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:21,994 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:22,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:23:22,209 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1396364564, now seen corresponding path program 17 times [2021-06-05 05:23:22,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:22,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052080967] [2021-06-05 05:23:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:22,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:22,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052080967] [2021-06-05 05:23:22,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052080967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:22,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524236044] [2021-06-05 05:23:22,233 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 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 05:23:22,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:23:22,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:22,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:23:22,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:22,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524236044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:22,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:22,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 05:23:22,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499837192] [2021-06-05 05:23:22,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:23:22,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:22,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:23:22,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:23:22,296 INFO L87 Difference]: Start difference. First operand 279 states and 555 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:22,313 INFO L93 Difference]: Finished difference Result 479 states and 948 transitions. [2021-06-05 05:23:22,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:23:22,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:23:22,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:22,314 INFO L225 Difference]: With dead ends: 479 [2021-06-05 05:23:22,314 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 05:23:22,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:23:22,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 05:23:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 320. [2021-06-05 05:23:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.0250783699059562) internal successors, (646), 319 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 05:23:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 646 transitions. [2021-06-05 05:23:22,319 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 646 transitions. Word has length 28 [2021-06-05 05:23:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:22,320 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 646 transitions. [2021-06-05 05:23:22,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:22,320 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 646 transitions. [2021-06-05 05:23:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:22,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:22,320 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:22,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:23:22,536 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:22,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash -160566182, now seen corresponding path program 18 times [2021-06-05 05:23:22,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:22,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494756784] [2021-06-05 05:23:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:23:22,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:22,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494756784] [2021-06-05 05:23:22,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494756784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:22,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441010643] [2021-06-05 05:23:22,728 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 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 05:23:22,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:23:22,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:22,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:22,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:23,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:23,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:23,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:23,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:23,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:23,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:23,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:23,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:23,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:23,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:23,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:23,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:23,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:23,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:23,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:23,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:23,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:23,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441010643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:23,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:23,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 05:23:23,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766189421] [2021-06-05 05:23:23,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:23,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:23,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:23,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:23,070 INFO L87 Difference]: Start difference. First operand 320 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:23,254 INFO L93 Difference]: Finished difference Result 708 states and 1436 transitions. [2021-06-05 05:23:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:23:23,254 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:23,255 INFO L225 Difference]: With dead ends: 708 [2021-06-05 05:23:23,255 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 05:23:23,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 05:23:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 392. [2021-06-05 05:23:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 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 05:23:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2021-06-05 05:23:23,261 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 31 [2021-06-05 05:23:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:23,261 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2021-06-05 05:23:23,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2021-06-05 05:23:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:23,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:23,262 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:23,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 05:23:23,478 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:23,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1308942062, now seen corresponding path program 19 times [2021-06-05 05:23:23,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:23,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118588232] [2021-06-05 05:23:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:23,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:23,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118588232] [2021-06-05 05:23:23,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118588232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:23,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865082978] [2021-06-05 05:23:23,702 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 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 05:23:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:23,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:23,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:24,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:24,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:24,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:24,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:24,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:24,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:24,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:24,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:24,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:24,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:24,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:24,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:24,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:24,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:24,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:24,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:24,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:24,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:24,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865082978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:24,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:24,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:23:24,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004633507] [2021-06-05 05:23:24,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:24,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:24,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:24,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:24,081 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:24,306 INFO L93 Difference]: Finished difference Result 810 states and 1669 transitions. [2021-06-05 05:23:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:23:24,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:24,310 INFO L225 Difference]: With dead ends: 810 [2021-06-05 05:23:24,310 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 05:23:24,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 422.6ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:23:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 05:23:24,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 413. [2021-06-05 05:23:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0072815533980584) internal successors, (827), 412 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:24,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 827 transitions. [2021-06-05 05:23:24,316 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 827 transitions. Word has length 31 [2021-06-05 05:23:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:24,316 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 827 transitions. [2021-06-05 05:23:24,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 827 transitions. [2021-06-05 05:23:24,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:24,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:24,316 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:24,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:23:24,525 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1649221820, now seen corresponding path program 20 times [2021-06-05 05:23:24,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:24,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406397509] [2021-06-05 05:23:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:24,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:24,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406397509] [2021-06-05 05:23:24,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406397509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:24,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097053006] [2021-06-05 05:23:24,727 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 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 05:23:24,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:24,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:24,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:25,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:25,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:25,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:25,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:25,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:25,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:25,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:25,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:25,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:25,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:25,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:25,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:25,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:25,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:25,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:25,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:25,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:25,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097053006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:25,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:25,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:23:25,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570333521] [2021-06-05 05:23:25,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:25,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:25,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:25,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:25,077 INFO L87 Difference]: Start difference. First operand 413 states and 827 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:25,361 INFO L93 Difference]: Finished difference Result 880 states and 1806 transitions. [2021-06-05 05:23:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:25,363 INFO L225 Difference]: With dead ends: 880 [2021-06-05 05:23:25,363 INFO L226 Difference]: Without dead ends: 824 [2021-06-05 05:23:25,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:23:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-05 05:23:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 425. [2021-06-05 05:23:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 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 05:23:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2021-06-05 05:23:25,369 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 31 [2021-06-05 05:23:25,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:25,370 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2021-06-05 05:23:25,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2021-06-05 05:23:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:25,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:25,370 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:25,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:25,585 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1866596212, now seen corresponding path program 21 times [2021-06-05 05:23:25,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:25,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022851860] [2021-06-05 05:23:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:25,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:25,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022851860] [2021-06-05 05:23:25,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022851860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:25,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819118429] [2021-06-05 05:23:25,790 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 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 05:23:25,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:23:25,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:25,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:25,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:26,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:26,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:26,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:26,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:26,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:26,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:26,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:26,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:26,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:26,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:26,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:26,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:26,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:26,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:26,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:26,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:26,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:26,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819118429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:26,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:26,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:23:26,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646861913] [2021-06-05 05:23:26,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:26,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:26,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:26,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:26,165 INFO L87 Difference]: Start difference. First operand 425 states and 852 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:26,376 INFO L93 Difference]: Finished difference Result 809 states and 1648 transitions. [2021-06-05 05:23:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:26,376 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:26,378 INFO L225 Difference]: With dead ends: 809 [2021-06-05 05:23:26,378 INFO L226 Difference]: Without dead ends: 769 [2021-06-05 05:23:26,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 408.9ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:23:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-05 05:23:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 428. [2021-06-05 05:23:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.011709601873536) internal successors, (859), 427 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 859 transitions. [2021-06-05 05:23:26,384 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 859 transitions. Word has length 31 [2021-06-05 05:23:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:26,384 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 859 transitions. [2021-06-05 05:23:26,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 859 transitions. [2021-06-05 05:23:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:26,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:26,384 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:26,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:23:26,600 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:26,600 INFO L82 PathProgramCache]: Analyzing trace with hash 865807024, now seen corresponding path program 22 times [2021-06-05 05:23:26,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:26,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651389703] [2021-06-05 05:23:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:23:26,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:26,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651389703] [2021-06-05 05:23:26,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651389703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:26,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562614787] [2021-06-05 05:23:26,751 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 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 05:23:26,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:26,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:26,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:26,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:27,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:27,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:27,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:27,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:27,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:27,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:27,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:27,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:27,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562614787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:27,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:27,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2021-06-05 05:23:27,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196845152] [2021-06-05 05:23:27,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:27,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:27,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:27,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:27,061 INFO L87 Difference]: Start difference. First operand 428 states and 859 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:27,286 INFO L93 Difference]: Finished difference Result 853 states and 1716 transitions. [2021-06-05 05:23:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:23:27,287 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:27,288 INFO L225 Difference]: With dead ends: 853 [2021-06-05 05:23:27,288 INFO L226 Difference]: Without dead ends: 708 [2021-06-05 05:23:27,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:27,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-05 05:23:27,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 464. [2021-06-05 05:23:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.9978401727861772) internal successors, (925), 463 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 925 transitions. [2021-06-05 05:23:27,294 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 925 transitions. Word has length 31 [2021-06-05 05:23:27,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:27,294 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 925 transitions. [2021-06-05 05:23:27,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 925 transitions. [2021-06-05 05:23:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:27,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:27,295 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:27,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:27,510 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:27,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:27,511 INFO L82 PathProgramCache]: Analyzing trace with hash -282568856, now seen corresponding path program 23 times [2021-06-05 05:23:27,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:27,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338864681] [2021-06-05 05:23:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:27,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:27,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338864681] [2021-06-05 05:23:27,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338864681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:27,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126826189] [2021-06-05 05:23:27,676 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 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 05:23:27,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:23:27,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:27,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:27,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:27,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:27,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:27,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:27,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:27,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:27,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:28,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:28,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:28,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126826189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:28,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:28,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 05:23:28,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831362536] [2021-06-05 05:23:28,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:28,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:28,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:28,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:28,014 INFO L87 Difference]: Start difference. First operand 464 states and 925 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:28,199 INFO L93 Difference]: Finished difference Result 925 states and 1897 transitions. [2021-06-05 05:23:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:23:28,199 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:28,201 INFO L225 Difference]: With dead ends: 925 [2021-06-05 05:23:28,201 INFO L226 Difference]: Without dead ends: 872 [2021-06-05 05:23:28,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-05 05:23:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 461. [2021-06-05 05:23:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.9978260869565216) internal successors, (919), 460 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 919 transitions. [2021-06-05 05:23:28,208 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 919 transitions. Word has length 31 [2021-06-05 05:23:28,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:28,208 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 919 transitions. [2021-06-05 05:23:28,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 919 transitions. [2021-06-05 05:23:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:28,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:28,209 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:28,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:23:28,424 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:28,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1619372270, now seen corresponding path program 24 times [2021-06-05 05:23:28,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:28,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027046854] [2021-06-05 05:23:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:28,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:28,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027046854] [2021-06-05 05:23:28,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027046854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:28,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138673486] [2021-06-05 05:23:28,599 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 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 05:23:28,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:23:28,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:28,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:28,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:28,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:28,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:28,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:28,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:28,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:28,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:28,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:28,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:28,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:28,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:28,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:28,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:28,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:28,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:28,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:28,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:28,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:28,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138673486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:28,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:28,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 05:23:28,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278680457] [2021-06-05 05:23:28,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:28,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:28,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:28,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:28,938 INFO L87 Difference]: Start difference. First operand 461 states and 919 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:29,210 INFO L93 Difference]: Finished difference Result 962 states and 1970 transitions. [2021-06-05 05:23:29,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:23:29,210 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:29,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:29,212 INFO L225 Difference]: With dead ends: 962 [2021-06-05 05:23:29,212 INFO L226 Difference]: Without dead ends: 906 [2021-06-05 05:23:29,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-06-05 05:23:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 458. [2021-06-05 05:23:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.9978118161925602) internal successors, (913), 457 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 913 transitions. [2021-06-05 05:23:29,219 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 913 transitions. Word has length 31 [2021-06-05 05:23:29,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:29,219 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 913 transitions. [2021-06-05 05:23:29,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,220 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 913 transitions. [2021-06-05 05:23:29,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:29,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:29,220 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:29,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:29,437 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:29,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1401997878, now seen corresponding path program 25 times [2021-06-05 05:23:29,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:29,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697572566] [2021-06-05 05:23:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:29,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:29,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697572566] [2021-06-05 05:23:29,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697572566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:29,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232970191] [2021-06-05 05:23:29,615 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 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 05:23:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:29,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:29,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:29,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:29,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:29,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:29,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:29,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:29,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:29,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:29,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:29,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:29,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:29,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:29,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:29,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232970191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:29,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:29,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:23:29,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637742277] [2021-06-05 05:23:29,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:29,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:29,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:29,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:29,974 INFO L87 Difference]: Start difference. First operand 458 states and 913 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:30,188 INFO L93 Difference]: Finished difference Result 936 states and 1914 transitions. [2021-06-05 05:23:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:23:30,188 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:30,190 INFO L225 Difference]: With dead ends: 936 [2021-06-05 05:23:30,190 INFO L226 Difference]: Without dead ends: 877 [2021-06-05 05:23:30,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 385.7ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:23:30,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-06-05 05:23:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 434. [2021-06-05 05:23:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0115473441108547) internal successors, (871), 433 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 05:23:30,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 871 transitions. [2021-06-05 05:23:30,196 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 871 transitions. Word has length 31 [2021-06-05 05:23:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:30,196 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 871 transitions. [2021-06-05 05:23:30,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 871 transitions. [2021-06-05 05:23:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:30,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:30,196 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:30,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:23:30,405 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:30,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:30,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1874857228, now seen corresponding path program 26 times [2021-06-05 05:23:30,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:30,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088047285] [2021-06-05 05:23:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:30,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:30,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088047285] [2021-06-05 05:23:30,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088047285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:30,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512514759] [2021-06-05 05:23:30,594 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 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 05:23:30,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:30,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:30,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:30,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:30,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:30,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:30,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:30,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:30,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:30,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:30,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:30,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512514759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:30,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:30,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:23:30,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248302154] [2021-06-05 05:23:30,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:30,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:30,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:30,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:30,938 INFO L87 Difference]: Start difference. First operand 434 states and 871 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:31,148 INFO L93 Difference]: Finished difference Result 947 states and 1941 transitions. [2021-06-05 05:23:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:23:31,148 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:31,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:31,150 INFO L225 Difference]: With dead ends: 947 [2021-06-05 05:23:31,150 INFO L226 Difference]: Without dead ends: 905 [2021-06-05 05:23:31,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:23:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-06-05 05:23:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 431. [2021-06-05 05:23:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.0186046511627906) internal successors, (868), 430 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 868 transitions. [2021-06-05 05:23:31,156 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 868 transitions. Word has length 31 [2021-06-05 05:23:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:31,156 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 868 transitions. [2021-06-05 05:23:31,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 868 transitions. [2021-06-05 05:23:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:31,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:31,157 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:31,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:31,365 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:31,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:31,365 INFO L82 PathProgramCache]: Analyzing trace with hash 615761780, now seen corresponding path program 27 times [2021-06-05 05:23:31,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:31,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283426166] [2021-06-05 05:23:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:31,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:31,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283426166] [2021-06-05 05:23:31,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283426166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:31,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727487734] [2021-06-05 05:23:31,538 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 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 05:23:31,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:23:31,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:31,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:31,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:31,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:31,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:31,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:31,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:31,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:31,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:31,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:31,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:31,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:31,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:31,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:31,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 32 [2021-06-05 05:23:31,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:31,969 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 05:23:31,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:31,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-06-05 05:23:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:31,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727487734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:31,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:31,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:23:31,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713272883] [2021-06-05 05:23:31,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:31,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:31,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:31,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:31,980 INFO L87 Difference]: Start difference. First operand 431 states and 868 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:32,290 INFO L93 Difference]: Finished difference Result 780 states and 1574 transitions. [2021-06-05 05:23:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:32,290 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:32,292 INFO L225 Difference]: With dead ends: 780 [2021-06-05 05:23:32,292 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 05:23:32,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 477.2ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:23:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 05:23:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 470. [2021-06-05 05:23:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-06-05 05:23:32,297 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-06-05 05:23:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:32,297 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-06-05 05:23:32,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-06-05 05:23:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:32,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:32,298 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:32,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 05:23:32,516 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:32,517 INFO L82 PathProgramCache]: Analyzing trace with hash 833136172, now seen corresponding path program 28 times [2021-06-05 05:23:32,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:32,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260075858] [2021-06-05 05:23:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:32,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:32,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260075858] [2021-06-05 05:23:32,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260075858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:32,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435359689] [2021-06-05 05:23:32,699 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 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 05:23:32,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:32,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:32,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:33,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:33,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:33,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:33,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:33,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:33,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:33,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:33,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:33,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:33,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:33,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435359689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:33,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:33,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:23:33,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033644091] [2021-06-05 05:23:33,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:33,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:33,046 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:33,290 INFO L93 Difference]: Finished difference Result 833 states and 1680 transitions. [2021-06-05 05:23:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:33,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:33,293 INFO L225 Difference]: With dead ends: 833 [2021-06-05 05:23:33,293 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 05:23:33,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:23:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 05:23:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 470. [2021-06-05 05:23:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-06-05 05:23:33,299 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-06-05 05:23:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:33,299 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-06-05 05:23:33,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-06-05 05:23:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:33,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:33,299 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:33,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:33,509 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:33,509 INFO L82 PathProgramCache]: Analyzing trace with hash -167653016, now seen corresponding path program 29 times [2021-06-05 05:23:33,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:33,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829651923] [2021-06-05 05:23:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:33,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:33,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829651923] [2021-06-05 05:23:33,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829651923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:33,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840291863] [2021-06-05 05:23:33,667 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 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 05:23:33,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:23:33,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:33,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:33,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:34,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:34,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:34,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:34,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:34,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 32 [2021-06-05 05:23:34,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:34,047 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 05:23:34,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:34,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-06-05 05:23:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:34,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840291863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:34,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:34,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 05:23:34,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81060820] [2021-06-05 05:23:34,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:34,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:34,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:34,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:34,058 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:34,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:34,374 INFO L93 Difference]: Finished difference Result 1001 states and 2003 transitions. [2021-06-05 05:23:34,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:23:34,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:34,377 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 05:23:34,377 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 05:23:34,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:23:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 05:23:34,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 512. [2021-06-05 05:23:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.9921722113502935) internal successors, (1018), 511 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1018 transitions. [2021-06-05 05:23:34,383 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1018 transitions. Word has length 31 [2021-06-05 05:23:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:34,383 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1018 transitions. [2021-06-05 05:23:34,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1018 transitions. [2021-06-05 05:23:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:34,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:34,384 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:34,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:23:34,597 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:34,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1642134986, now seen corresponding path program 30 times [2021-06-05 05:23:34,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:34,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296493985] [2021-06-05 05:23:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:34,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:34,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296493985] [2021-06-05 05:23:34,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296493985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:34,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464628548] [2021-06-05 05:23:34,756 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 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 05:23:34,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:23:34,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:34,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:34,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:35,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:35,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:35,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:35,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:35,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:35,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:35,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:35,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:35,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:35,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:35,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:35,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:35,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:35,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:35,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:35,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:35,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:35,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:35,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:35,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464628548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:35,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:35,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 05:23:35,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866246663] [2021-06-05 05:23:35,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:35,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:35,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:35,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:35,077 INFO L87 Difference]: Start difference. First operand 512 states and 1018 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:35,288 INFO L93 Difference]: Finished difference Result 1117 states and 2272 transitions. [2021-06-05 05:23:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:23:35,289 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:35,291 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 05:23:35,291 INFO L226 Difference]: Without dead ends: 1061 [2021-06-05 05:23:35,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:35,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-06-05 05:23:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 539. [2021-06-05 05:23:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.986988847583643) internal successors, (1069), 538 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1069 transitions. [2021-06-05 05:23:35,298 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1069 transitions. Word has length 31 [2021-06-05 05:23:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:35,298 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1069 transitions. [2021-06-05 05:23:35,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1069 transitions. [2021-06-05 05:23:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:35,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:35,299 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:35,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 05:23:35,503 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:35,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1859509378, now seen corresponding path program 31 times [2021-06-05 05:23:35,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:35,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611765062] [2021-06-05 05:23:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:35,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:35,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611765062] [2021-06-05 05:23:35,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611765062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:35,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687352790] [2021-06-05 05:23:35,676 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 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 05:23:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:35,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:35,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:36,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:36,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:36,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:36,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:36,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:36,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:36,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:36,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:36,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:36,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:36,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:36,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:36,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687352790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:36,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:36,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:23:36,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491312818] [2021-06-05 05:23:36,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:36,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:36,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:36,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:36,042 INFO L87 Difference]: Start difference. First operand 539 states and 1069 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:36,310 INFO L93 Difference]: Finished difference Result 1088 states and 2213 transitions. [2021-06-05 05:23:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:23:36,310 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:36,312 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 05:23:36,312 INFO L226 Difference]: Without dead ends: 1029 [2021-06-05 05:23:36,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:23:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-05 05:23:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 536. [2021-06-05 05:23:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.9869158878504674) internal successors, (1063), 535 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1063 transitions. [2021-06-05 05:23:36,319 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1063 transitions. Word has length 31 [2021-06-05 05:23:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:36,319 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1063 transitions. [2021-06-05 05:23:36,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1063 transitions. [2021-06-05 05:23:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:36,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:36,320 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:36,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:23:36,522 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:36,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1386650028, now seen corresponding path program 32 times [2021-06-05 05:23:36,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:36,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614316031] [2021-06-05 05:23:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:36,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:36,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614316031] [2021-06-05 05:23:36,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614316031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:36,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373120905] [2021-06-05 05:23:36,701 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 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 05:23:36,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:36,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:36,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:37,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:37,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:37,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:37,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:37,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:37,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:37,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:37,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:37,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:37,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:37,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:37,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:37,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:37,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:37,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:37,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373120905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:37,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:37,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:23:37,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015286041] [2021-06-05 05:23:37,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:37,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:37,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:37,056 INFO L87 Difference]: Start difference. First operand 536 states and 1063 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:37,321 INFO L93 Difference]: Finished difference Result 1059 states and 2151 transitions. [2021-06-05 05:23:37,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:23:37,321 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:37,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:37,323 INFO L225 Difference]: With dead ends: 1059 [2021-06-05 05:23:37,324 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 05:23:37,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:23:37,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 05:23:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 533. [2021-06-05 05:23:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.986842105263158) internal successors, (1057), 532 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1057 transitions. [2021-06-05 05:23:37,330 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1057 transitions. Word has length 31 [2021-06-05 05:23:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:37,330 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1057 transitions. [2021-06-05 05:23:37,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1057 transitions. [2021-06-05 05:23:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:37,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:37,331 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:37,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:23:37,545 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:37,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1919082992, now seen corresponding path program 33 times [2021-06-05 05:23:37,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:37,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233694015] [2021-06-05 05:23:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:37,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:37,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233694015] [2021-06-05 05:23:37,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233694015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:37,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543616278] [2021-06-05 05:23:37,697 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 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 05:23:37,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:23:37,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:37,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:37,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:38,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:38,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:38,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:38,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:38,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:38,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:38,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:38,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:38,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:38,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:38,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:38,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:38,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:38,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:38,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543616278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:38,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:38,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 05:23:38,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167285305] [2021-06-05 05:23:38,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:38,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:38,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:38,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:38,243 INFO L87 Difference]: Start difference. First operand 533 states and 1057 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:38,424 INFO L93 Difference]: Finished difference Result 1026 states and 2079 transitions. [2021-06-05 05:23:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:23:38,425 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:38,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:38,427 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 05:23:38,427 INFO L226 Difference]: Without dead ends: 938 [2021-06-05 05:23:38,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-06-05 05:23:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 575. [2021-06-05 05:23:38,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.9825783972125435) internal successors, (1138), 574 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1138 transitions. [2021-06-05 05:23:38,434 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1138 transitions. Word has length 31 [2021-06-05 05:23:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:38,434 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1138 transitions. [2021-06-05 05:23:38,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1138 transitions. [2021-06-05 05:23:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:38,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:38,435 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:38,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:23:38,651 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:38,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:38,651 INFO L82 PathProgramCache]: Analyzing trace with hash -566096302, now seen corresponding path program 34 times [2021-06-05 05:23:38,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:38,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414894683] [2021-06-05 05:23:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:38,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:38,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414894683] [2021-06-05 05:23:38,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414894683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:38,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244045442] [2021-06-05 05:23:38,805 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:23:38,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:38,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:38,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:39,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:39,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:39,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:39,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:39,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:39,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:39,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:39,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:39,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:39,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:39,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:39,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:39,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:39,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:39,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:39,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:39,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:39,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:39,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:39,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244045442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:39,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:39,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 05:23:39,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950611955] [2021-06-05 05:23:39,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:39,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:39,155 INFO L87 Difference]: Start difference. First operand 575 states and 1138 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:39,367 INFO L93 Difference]: Finished difference Result 1110 states and 2251 transitions. [2021-06-05 05:23:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:39,368 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:39,370 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 05:23:39,370 INFO L226 Difference]: Without dead ends: 1057 [2021-06-05 05:23:39,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:39,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-05 05:23:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 563. [2021-06-05 05:23:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.9822064056939501) internal successors, (1114), 562 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1114 transitions. [2021-06-05 05:23:39,378 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1114 transitions. Word has length 31 [2021-06-05 05:23:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:39,378 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1114 transitions. [2021-06-05 05:23:39,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1114 transitions. [2021-06-05 05:23:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:39,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:39,379 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:39,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:23:39,579 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:39,579 INFO L82 PathProgramCache]: Analyzing trace with hash -348721910, now seen corresponding path program 35 times [2021-06-05 05:23:39,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:39,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307482294] [2021-06-05 05:23:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:39,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:39,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307482294] [2021-06-05 05:23:39,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307482294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:39,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095982845] [2021-06-05 05:23:39,753 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 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 05:23:39,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:23:39,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:39,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:23:39,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:40,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:40,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:40,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:40,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2021-06-05 05:23:40,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:40,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:40,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:40,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:9 [2021-06-05 05:23:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:40,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095982845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:40,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:40,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 05:23:40,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736426762] [2021-06-05 05:23:40,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:23:40,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:40,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:23:40,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:23:40,161 INFO L87 Difference]: Start difference. First operand 563 states and 1114 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:41,086 INFO L93 Difference]: Finished difference Result 1236 states and 2487 transitions. [2021-06-05 05:23:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:23:41,087 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:41,088 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 05:23:41,088 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 05:23:41,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 895.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:23:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 05:23:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 578. [2021-06-05 05:23:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.977469670710572) internal successors, (1141), 577 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1141 transitions. [2021-06-05 05:23:41,095 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1141 transitions. Word has length 31 [2021-06-05 05:23:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:41,095 INFO L482 AbstractCegarLoop]: Abstraction has 578 states and 1141 transitions. [2021-06-05 05:23:41,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1141 transitions. [2021-06-05 05:23:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:41,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:41,096 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:41,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 05:23:41,312 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:41,312 INFO L82 PathProgramCache]: Analyzing trace with hash -821581260, now seen corresponding path program 36 times [2021-06-05 05:23:41,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:41,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783779009] [2021-06-05 05:23:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:41,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783779009] [2021-06-05 05:23:41,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783779009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730146190] [2021-06-05 05:23:41,478 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 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 05:23:41,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:23:41,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:41,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:23:41,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:41,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:41,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:41,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:41,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:41,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:41,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:41,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:41,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:41,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:41,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:41,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:41,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:41,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:41,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:41,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730146190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:41,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:41,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:23:41,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725977058] [2021-06-05 05:23:41,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:41,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:41,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:41,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:41,852 INFO L87 Difference]: Start difference. First operand 578 states and 1141 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:42,042 INFO L93 Difference]: Finished difference Result 1207 states and 2430 transitions. [2021-06-05 05:23:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:23:42,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:42,044 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 05:23:42,044 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 05:23:42,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:23:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 05:23:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 614. [2021-06-05 05:23:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.9804241435562806) internal successors, (1214), 613 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1214 transitions. [2021-06-05 05:23:42,051 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1214 transitions. Word has length 31 [2021-06-05 05:23:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:42,051 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1214 transitions. [2021-06-05 05:23:42,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1214 transitions. [2021-06-05 05:23:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:42,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:42,052 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:42,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:42,265 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:42,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1916779244, now seen corresponding path program 37 times [2021-06-05 05:23:42,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:42,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447331814] [2021-06-05 05:23:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:42,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:42,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447331814] [2021-06-05 05:23:42,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447331814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:42,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186385288] [2021-06-05 05:23:42,444 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 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 05:23:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:42,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:42,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:42,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:42,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:42,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:42,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:42,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:42,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:42,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:42,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:42,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:42,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:42,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:42,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:42,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:42,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:42,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:42,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:42,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:42,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:42,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186385288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:42,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:42,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:23:42,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703315688] [2021-06-05 05:23:42,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:42,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:42,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:42,812 INFO L87 Difference]: Start difference. First operand 614 states and 1214 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:43,114 INFO L93 Difference]: Finished difference Result 1033 states and 2073 transitions. [2021-06-05 05:23:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:43,114 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:43,115 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 05:23:43,115 INFO L226 Difference]: Without dead ends: 1010 [2021-06-05 05:23:43,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-06-05 05:23:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 624. [2021-06-05 05:23:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 1.9823434991974318) internal successors, (1235), 623 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1235 transitions. [2021-06-05 05:23:43,122 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1235 transitions. Word has length 31 [2021-06-05 05:23:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:43,122 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 1235 transitions. [2021-06-05 05:23:43,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1235 transitions. [2021-06-05 05:23:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:43,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:43,123 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:43,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:43,325 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:43,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1512927684, now seen corresponding path program 38 times [2021-06-05 05:23:43,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:43,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882752964] [2021-06-05 05:23:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:43,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:43,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882752964] [2021-06-05 05:23:43,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882752964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:43,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324623298] [2021-06-05 05:23:43,517 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 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 05:23:43,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:43,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:43,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:43,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:43,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:43,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:43,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:43,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:43,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:43,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:43,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:43,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:43,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:43,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:43,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:43,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324623298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:43,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:43,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 05:23:43,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397855919] [2021-06-05 05:23:43,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:43,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:43,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:43,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:43,820 INFO L87 Difference]: Start difference. First operand 624 states and 1235 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:44,113 INFO L93 Difference]: Finished difference Result 1316 states and 2627 transitions. [2021-06-05 05:23:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:23:44,113 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:44,115 INFO L225 Difference]: With dead ends: 1316 [2021-06-05 05:23:44,115 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 05:23:44,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 428.0ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:23:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 05:23:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 717. [2021-06-05 05:23:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.9594972067039107) internal successors, (1403), 716 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1403 transitions. [2021-06-05 05:23:44,124 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1403 transitions. Word has length 31 [2021-06-05 05:23:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:44,124 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1403 transitions. [2021-06-05 05:23:44,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1403 transitions. [2021-06-05 05:23:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:44,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:44,125 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:44,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:44,341 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash 514234710, now seen corresponding path program 39 times [2021-06-05 05:23:44,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:44,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430755003] [2021-06-05 05:23:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:44,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:44,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430755003] [2021-06-05 05:23:44,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430755003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:44,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823427992] [2021-06-05 05:23:44,524 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 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 05:23:44,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:23:44,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:44,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:44,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:44,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:44,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:44,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:44,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:44,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:44,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:44,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:44,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:44,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:44,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:44,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:44,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:44,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823427992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:44,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:44,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 05:23:44,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027090636] [2021-06-05 05:23:44,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:44,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:44,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:44,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:44,856 INFO L87 Difference]: Start difference. First operand 717 states and 1403 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:45,071 INFO L93 Difference]: Finished difference Result 1252 states and 2517 transitions. [2021-06-05 05:23:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:45,071 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:45,072 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 05:23:45,072 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 05:23:45,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:23:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 05:23:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 762. [2021-06-05 05:23:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.9540078843626807) internal successors, (1487), 761 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1487 transitions. [2021-06-05 05:23:45,081 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1487 transitions. Word has length 31 [2021-06-05 05:23:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:45,081 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1487 transitions. [2021-06-05 05:23:45,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1487 transitions. [2021-06-05 05:23:45,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:45,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:45,082 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:45,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 05:23:45,290 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash -486554478, now seen corresponding path program 40 times [2021-06-05 05:23:45,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:45,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269039446] [2021-06-05 05:23:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:45,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:45,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269039446] [2021-06-05 05:23:45,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269039446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:45,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864398400] [2021-06-05 05:23:45,465 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 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 05:23:45,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:45,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:45,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:45,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:45,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:45,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:45,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:45,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:45,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:45,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:45,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:45,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:45,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:45,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:45,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:45,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:45,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:45,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:45,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864398400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:45,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:45,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 05:23:45,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773481321] [2021-06-05 05:23:45,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:45,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:45,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:45,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:45,779 INFO L87 Difference]: Start difference. First operand 762 states and 1487 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:46,123 INFO L93 Difference]: Finished difference Result 1353 states and 2677 transitions. [2021-06-05 05:23:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:23:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:46,125 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 05:23:46,125 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 05:23:46,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:23:46,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 05:23:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 678. [2021-06-05 05:23:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.9748892171344166) internal successors, (1337), 677 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1337 transitions. [2021-06-05 05:23:46,132 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1337 transitions. Word has length 31 [2021-06-05 05:23:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:46,133 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 1337 transitions. [2021-06-05 05:23:46,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1337 transitions. [2021-06-05 05:23:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:46,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:46,133 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:46,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:46,349 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:46,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1540607916, now seen corresponding path program 41 times [2021-06-05 05:23:46,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:46,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643886467] [2021-06-05 05:23:46,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:46,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:46,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643886467] [2021-06-05 05:23:46,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643886467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:46,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198684389] [2021-06-05 05:23:46,528 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 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 05:23:46,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:23:46,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:46,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:46,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:46,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:46,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:46,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:46,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:46,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:46,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:46,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:46,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:46,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:46,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:46,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:46,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:46,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:46,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:46,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:46,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:46,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198684389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:46,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:46,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 05:23:46,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592200922] [2021-06-05 05:23:46,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:46,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:46,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:46,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:46,872 INFO L87 Difference]: Start difference. First operand 678 states and 1337 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:47,072 INFO L93 Difference]: Finished difference Result 1283 states and 2599 transitions. [2021-06-05 05:23:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:23:47,072 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:47,074 INFO L225 Difference]: With dead ends: 1283 [2021-06-05 05:23:47,074 INFO L226 Difference]: Without dead ends: 1224 [2021-06-05 05:23:47,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 394.9ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-06-05 05:23:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 681. [2021-06-05 05:23:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.975) internal successors, (1343), 680 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1343 transitions. [2021-06-05 05:23:47,081 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1343 transitions. Word has length 31 [2021-06-05 05:23:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:47,081 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 1343 transitions. [2021-06-05 05:23:47,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1343 transitions. [2021-06-05 05:23:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:47,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:47,089 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:47,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:47,291 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:47,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1067748566, now seen corresponding path program 42 times [2021-06-05 05:23:47,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:47,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320611486] [2021-06-05 05:23:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:47,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:47,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320611486] [2021-06-05 05:23:47,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320611486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:47,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132347794] [2021-06-05 05:23:47,475 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 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 05:23:47,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:23:47,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:47,499 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:47,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:47,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:47,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:47,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:47,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:47,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:47,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:47,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132347794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:47,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:47,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 05:23:47,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897450060] [2021-06-05 05:23:47,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:47,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:47,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:47,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:47,798 INFO L87 Difference]: Start difference. First operand 681 states and 1343 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:48,033 INFO L93 Difference]: Finished difference Result 1174 states and 2374 transitions. [2021-06-05 05:23:48,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:23:48,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:48,034 INFO L225 Difference]: With dead ends: 1174 [2021-06-05 05:23:48,034 INFO L226 Difference]: Without dead ends: 1132 [2021-06-05 05:23:48,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-06-05 05:23:48,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 684. [2021-06-05 05:23:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.9751098096632504) internal successors, (1349), 683 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1349 transitions. [2021-06-05 05:23:48,042 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1349 transitions. Word has length 31 [2021-06-05 05:23:48,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:48,042 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1349 transitions. [2021-06-05 05:23:48,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1349 transitions. [2021-06-05 05:23:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:48,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:48,043 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:48,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 05:23:48,249 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:48,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1600181530, now seen corresponding path program 43 times [2021-06-05 05:23:48,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:48,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135023990] [2021-06-05 05:23:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:48,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:48,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135023990] [2021-06-05 05:23:48,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135023990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:48,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252152302] [2021-06-05 05:23:48,431 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 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 05:23:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:48,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:48,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:48,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:48,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:48,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:48,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:48,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:48,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:48,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:48,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:48,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:48,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:48,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:48,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:48,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:48,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:48,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252152302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:48,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:48,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 05:23:48,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891842478] [2021-06-05 05:23:48,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:48,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:48,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:48,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:48,767 INFO L87 Difference]: Start difference. First operand 684 states and 1349 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:49,025 INFO L93 Difference]: Finished difference Result 1381 states and 2772 transitions. [2021-06-05 05:23:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:23:49,025 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:49,027 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 05:23:49,027 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 05:23:49,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 05:23:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 759. [2021-06-05 05:23:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.9736147757255937) internal successors, (1496), 758 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1496 transitions. [2021-06-05 05:23:49,036 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1496 transitions. Word has length 31 [2021-06-05 05:23:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:49,036 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 1496 transitions. [2021-06-05 05:23:49,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1496 transitions. [2021-06-05 05:23:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:49,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:49,037 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:49,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 05:23:49,241 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:49,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:49,241 INFO L82 PathProgramCache]: Analyzing trace with hash -667623372, now seen corresponding path program 44 times [2021-06-05 05:23:49,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:49,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838754047] [2021-06-05 05:23:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:49,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:49,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838754047] [2021-06-05 05:23:49,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838754047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:49,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150237690] [2021-06-05 05:23:49,421 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 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 05:23:49,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:49,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:49,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:49,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:49,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:49,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:49,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:49,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:49,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:49,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:49,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:49,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:49,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:49,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:49,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:49,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:49,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:49,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:49,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150237690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:49,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:49,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 05:23:49,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377283094] [2021-06-05 05:23:49,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:49,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:49,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:49,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:49,771 INFO L87 Difference]: Start difference. First operand 759 states and 1496 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:50,065 INFO L93 Difference]: Finished difference Result 1359 states and 2747 transitions. [2021-06-05 05:23:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:50,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:50,067 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 05:23:50,067 INFO L226 Difference]: Without dead ends: 1304 [2021-06-05 05:23:50,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-05 05:23:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 774. [2021-06-05 05:23:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-05 05:23:50,076 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-05 05:23:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:50,076 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-05 05:23:50,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-05 05:23:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:50,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:50,077 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:50,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:23:50,293 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1140482722, now seen corresponding path program 45 times [2021-06-05 05:23:50,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:50,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176792990] [2021-06-05 05:23:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:50,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:50,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176792990] [2021-06-05 05:23:50,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176792990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:50,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577084228] [2021-06-05 05:23:50,457 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 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 05:23:50,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:23:50,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:50,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:50,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:50,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:50,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:50,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:50,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:50,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:50,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:50,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:50,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:50,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:50,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:50,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:50,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:50,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:50,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577084228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:50,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:50,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 05:23:50,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626841728] [2021-06-05 05:23:50,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:50,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:50,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:50,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:50,782 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:50,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:50,952 INFO L93 Difference]: Finished difference Result 1116 states and 2233 transitions. [2021-06-05 05:23:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:50,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:50,959 INFO L225 Difference]: With dead ends: 1116 [2021-06-05 05:23:50,959 INFO L226 Difference]: Without dead ends: 1094 [2021-06-05 05:23:50,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-05 05:23:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 774. [2021-06-05 05:23:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-05 05:23:50,967 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-05 05:23:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:50,967 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-05 05:23:50,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-05 05:23:50,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:50,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:50,968 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:51,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:51,185 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:51,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1597877782, now seen corresponding path program 46 times [2021-06-05 05:23:51,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:51,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4901049] [2021-06-05 05:23:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:51,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:51,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4901049] [2021-06-05 05:23:51,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4901049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:51,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279263534] [2021-06-05 05:23:51,358 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 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 05:23:51,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:51,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:51,380 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:51,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:51,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:51,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:51,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:51,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:51,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:51,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:51,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:51,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:51,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:51,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:51,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:51,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:51,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:51,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:51,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279263534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:51,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:51,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 05:23:51,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678052670] [2021-06-05 05:23:51,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:51,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:51,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:51,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:51,671 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:51,994 INFO L93 Difference]: Finished difference Result 1127 states and 2256 transitions. [2021-06-05 05:23:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:51,994 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:51,996 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 05:23:51,996 INFO L226 Difference]: Without dead ends: 1104 [2021-06-05 05:23:51,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-06-05 05:23:52,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 774. [2021-06-05 05:23:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-05 05:23:52,004 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-05 05:23:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:52,004 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-05 05:23:52,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-05 05:23:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:52,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:52,005 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:52,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:52,211 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash 102354416, now seen corresponding path program 47 times [2021-06-05 05:23:52,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:52,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545904677] [2021-06-05 05:23:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:52,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:52,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545904677] [2021-06-05 05:23:52,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545904677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:52,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325413854] [2021-06-05 05:23:52,468 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 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 05:23:52,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:23:52,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:52,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:52,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:52,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:52,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:52,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:52,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:52,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:52,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:52,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:52,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:52,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325413854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:52,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:52,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-06-05 05:23:52,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285235700] [2021-06-05 05:23:52,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:52,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:52,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:52,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:52,785 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:52,949 INFO L93 Difference]: Finished difference Result 1217 states and 2444 transitions. [2021-06-05 05:23:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:52,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:52,951 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 05:23:52,951 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 05:23:52,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 404.6ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 05:23:52,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 801. [2021-06-05 05:23:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.98125) internal successors, (1585), 800 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1585 transitions. [2021-06-05 05:23:52,959 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1585 transitions. Word has length 31 [2021-06-05 05:23:52,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:52,959 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 1585 transitions. [2021-06-05 05:23:52,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:52,959 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1585 transitions. [2021-06-05 05:23:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:52,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:52,960 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:53,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 05:23:53,176 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:53,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:53,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1046021464, now seen corresponding path program 48 times [2021-06-05 05:23:53,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:53,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706336865] [2021-06-05 05:23:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:53,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:53,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706336865] [2021-06-05 05:23:53,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706336865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:53,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533780250] [2021-06-05 05:23:53,334 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 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 05:23:53,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:23:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:53,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:53,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:53,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:53,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:53,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:53,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:53,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:53,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:53,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:53,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:53,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:53,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:53,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:53,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:53,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:53,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533780250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:53,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:53,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-06-05 05:23:53,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384555004] [2021-06-05 05:23:53,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:53,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:53,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:53,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:53,613 INFO L87 Difference]: Start difference. First operand 801 states and 1585 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:53,851 INFO L93 Difference]: Finished difference Result 1401 states and 2833 transitions. [2021-06-05 05:23:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:53,851 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:53,853 INFO L225 Difference]: With dead ends: 1401 [2021-06-05 05:23:53,853 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 05:23:53,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 05:23:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 795. [2021-06-05 05:23:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 1.978589420654912) internal successors, (1571), 794 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1571 transitions. [2021-06-05 05:23:53,862 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1571 transitions. Word has length 31 [2021-06-05 05:23:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:53,862 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1571 transitions. [2021-06-05 05:23:53,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1571 transitions. [2021-06-05 05:23:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:53,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:53,863 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:54,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:54,079 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:54,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2129516810, now seen corresponding path program 49 times [2021-06-05 05:23:54,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:54,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394505397] [2021-06-05 05:23:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:54,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:54,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394505397] [2021-06-05 05:23:54,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394505397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:54,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608832934] [2021-06-05 05:23:54,244 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 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 05:23:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:54,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:54,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:54,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:54,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:54,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:54,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:54,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:54,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:54,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:54,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:54,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:54,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:54,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:54,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:54,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:54,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:54,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608832934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:54,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:54,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 05:23:54,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105586026] [2021-06-05 05:23:54,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:54,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:54,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:54,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:54,549 INFO L87 Difference]: Start difference. First operand 795 states and 1571 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:54,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:54,867 INFO L93 Difference]: Finished difference Result 1359 states and 2744 transitions. [2021-06-05 05:23:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:54,868 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:54,870 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 05:23:54,870 INFO L226 Difference]: Without dead ends: 1304 [2021-06-05 05:23:54,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-05 05:23:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 783. [2021-06-05 05:23:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-06-05 05:23:54,878 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-06-05 05:23:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:54,878 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-06-05 05:23:54,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-06-05 05:23:54,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:54,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:54,879 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:55,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 05:23:55,095 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:55,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:55,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1656657460, now seen corresponding path program 50 times [2021-06-05 05:23:55,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:55,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386201398] [2021-06-05 05:23:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:55,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:55,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386201398] [2021-06-05 05:23:55,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386201398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:55,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334433400] [2021-06-05 05:23:55,261 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 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 05:23:55,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:55,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:55,284 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:55,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:55,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:55,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:55,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:55,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:55,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:55,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:55,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:55,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:55,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:55,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:55,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:55,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:55,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334433400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:55,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:55,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 05:23:55,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937454866] [2021-06-05 05:23:55,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:55,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:55,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:55,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:55,558 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:55,836 INFO L93 Difference]: Finished difference Result 1153 states and 2311 transitions. [2021-06-05 05:23:55,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:55,836 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:55,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:55,837 INFO L225 Difference]: With dead ends: 1153 [2021-06-05 05:23:55,838 INFO L226 Difference]: Without dead ends: 1131 [2021-06-05 05:23:55,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-05 05:23:55,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 783. [2021-06-05 05:23:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-06-05 05:23:55,845 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-06-05 05:23:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:55,845 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-06-05 05:23:55,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-06-05 05:23:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:55,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:55,846 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:56,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 05:23:56,061 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash 100050668, now seen corresponding path program 51 times [2021-06-05 05:23:56,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:56,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36907553] [2021-06-05 05:23:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:56,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:56,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36907553] [2021-06-05 05:23:56,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36907553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:56,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142249780] [2021-06-05 05:23:56,227 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 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 05:23:56,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:23:56,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:56,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:56,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:56,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:56,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:56,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:56,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:56,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:56,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:56,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:56,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:56,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:56,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:56,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:56,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:56,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:56,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:56,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142249780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:56,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:56,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 05:23:56,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184471571] [2021-06-05 05:23:56,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:56,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:56,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:56,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:56,563 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:56,769 INFO L93 Difference]: Finished difference Result 1136 states and 2278 transitions. [2021-06-05 05:23:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:23:56,770 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:56,771 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 05:23:56,771 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 05:23:56,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 05:23:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 777. [2021-06-05 05:23:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.9755154639175259) internal successors, (1533), 776 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1533 transitions. [2021-06-05 05:23:56,778 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1533 transitions. Word has length 31 [2021-06-05 05:23:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:56,778 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 1533 transitions. [2021-06-05 05:23:56,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1533 transitions. [2021-06-05 05:23:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:23:56,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:56,779 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:56,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 05:23:56,995 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:56,996 INFO L82 PathProgramCache]: Analyzing trace with hash 948748694, now seen corresponding path program 52 times [2021-06-05 05:23:56,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:56,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134127574] [2021-06-05 05:23:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:57,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134127574] [2021-06-05 05:23:57,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134127574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060648669] [2021-06-05 05:23:57,183 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 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 05:23:57,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:57,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:57,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:57,419 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 05:23:57,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:57,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:57,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:57,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:57,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:12 [2021-06-05 05:23:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:57,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060648669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:57,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:57,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 05:23:57,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856575963] [2021-06-05 05:23:57,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:57,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:57,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:57,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:57,433 INFO L87 Difference]: Start difference. First operand 777 states and 1533 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:57,689 INFO L93 Difference]: Finished difference Result 1012 states and 2014 transitions. [2021-06-05 05:23:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:23:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:23:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:57,690 INFO L225 Difference]: With dead ends: 1012 [2021-06-05 05:23:57,690 INFO L226 Difference]: Without dead ends: 997 [2021-06-05 05:23:57,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-05 05:23:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2021-06-05 05:23:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.9770114942528736) internal successors, (1548), 783 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1548 transitions. [2021-06-05 05:23:57,696 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1548 transitions. Word has length 31 [2021-06-05 05:23:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:57,696 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 1548 transitions. [2021-06-05 05:23:57,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:57,697 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1548 transitions. [2021-06-05 05:23:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:57,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:57,697 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:57,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 05:23:57,898 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:57,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1698443767, now seen corresponding path program 53 times [2021-06-05 05:23:57,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:57,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865046575] [2021-06-05 05:23:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:57,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:57,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865046575] [2021-06-05 05:23:57,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865046575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:57,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582704055] [2021-06-05 05:23:57,924 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 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 05:23:57,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:23:57,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:57,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:23:57,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:57,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582704055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:57,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:57,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 05:23:57,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44401188] [2021-06-05 05:23:57,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:23:57,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:57,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:23:57,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:23:57,991 INFO L87 Difference]: Start difference. First operand 784 states and 1548 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:58,012 INFO L93 Difference]: Finished difference Result 1073 states and 2126 transitions. [2021-06-05 05:23:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:23:58,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:23:58,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:58,013 INFO L225 Difference]: With dead ends: 1073 [2021-06-05 05:23:58,013 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 05:23:58,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:23:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 05:23:58,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 845. [2021-06-05 05:23:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.9940758293838863) internal successors, (1683), 844 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1683 transitions. [2021-06-05 05:23:58,020 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1683 transitions. Word has length 33 [2021-06-05 05:23:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:58,020 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 1683 transitions. [2021-06-05 05:23:58,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1683 transitions. [2021-06-05 05:23:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:23:58,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:58,021 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:58,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:58,222 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:58,222 INFO L82 PathProgramCache]: Analyzing trace with hash 602846472, now seen corresponding path program 54 times [2021-06-05 05:23:58,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:58,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718420258] [2021-06-05 05:23:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:23:58,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:58,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718420258] [2021-06-05 05:23:58,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718420258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:58,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257799142] [2021-06-05 05:23:58,388 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 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 05:23:58,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:23:58,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:58,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:58,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:58,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:58,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:58,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:58,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:58,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:58,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:58,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:58,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:58,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:58,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:58,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:58,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:58,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:58,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:58,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257799142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:58,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:58,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 05:23:58,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729996872] [2021-06-05 05:23:58,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:58,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:58,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:58,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:58,700 INFO L87 Difference]: Start difference. First operand 845 states and 1683 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:59,003 INFO L93 Difference]: Finished difference Result 1429 states and 2876 transitions. [2021-06-05 05:23:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:23:59,003 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:23:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:59,004 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 05:23:59,004 INFO L226 Difference]: Without dead ends: 1414 [2021-06-05 05:23:59,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:23:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-06-05 05:23:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 869. [2021-06-05 05:23:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.9907834101382489) internal successors, (1728), 868 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1728 transitions. [2021-06-05 05:23:59,012 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1728 transitions. Word has length 34 [2021-06-05 05:23:59,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:59,013 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 1728 transitions. [2021-06-05 05:23:59,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:59,013 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1728 transitions. [2021-06-05 05:23:59,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:23:59,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:59,014 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:59,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 05:23:59,214 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:59,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:59,215 INFO L82 PathProgramCache]: Analyzing trace with hash 867153280, now seen corresponding path program 55 times [2021-06-05 05:23:59,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:59,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044674307] [2021-06-05 05:23:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:59,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:59,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044674307] [2021-06-05 05:23:59,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044674307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:59,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301277595] [2021-06-05 05:23:59,437 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 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 05:23:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:59,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:59,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:59,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:59,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:59,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:59,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:59,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:59,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:59,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:59,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:59,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:59,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:23:59,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:59,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:59,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:59,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:23:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:59,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301277595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:59,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:59,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 05:23:59,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627157387] [2021-06-05 05:23:59,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:59,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:59,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:59,770 INFO L87 Difference]: Start difference. First operand 869 states and 1728 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:00,129 INFO L93 Difference]: Finished difference Result 1640 states and 3316 transitions. [2021-06-05 05:24:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:24:00,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:24:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:00,131 INFO L225 Difference]: With dead ends: 1640 [2021-06-05 05:24:00,131 INFO L226 Difference]: Without dead ends: 1595 [2021-06-05 05:24:00,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 481.4ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:24:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-06-05 05:24:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 926. [2021-06-05 05:24:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9848648648648648) internal successors, (1836), 925 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1836 transitions. [2021-06-05 05:24:00,140 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1836 transitions. Word has length 34 [2021-06-05 05:24:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:00,140 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1836 transitions. [2021-06-05 05:24:00,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1836 transitions. [2021-06-05 05:24:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:24:00,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:00,141 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:00,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:00,342 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1679153002, now seen corresponding path program 56 times [2021-06-05 05:24:00,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:00,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951212348] [2021-06-05 05:24:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:00,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:00,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951212348] [2021-06-05 05:24:00,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951212348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:00,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436901686] [2021-06-05 05:24:00,512 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 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 05:24:00,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:00,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:00,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:24:00,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:00,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:00,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:00,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:00,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:00,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:00,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:00,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:00,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:00,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:00,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:00,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:00,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 05:24:00,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:00,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:00,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:00,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 05:24:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:00,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436901686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:00,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:00,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 05:24:00,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51176283] [2021-06-05 05:24:00,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:24:00,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:00,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:24:00,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:24:00,832 INFO L87 Difference]: Start difference. First operand 926 states and 1836 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:01,214 INFO L93 Difference]: Finished difference Result 1557 states and 3145 transitions. [2021-06-05 05:24:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:24:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:24:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:01,215 INFO L225 Difference]: With dead ends: 1557 [2021-06-05 05:24:01,215 INFO L226 Difference]: Without dead ends: 1512 [2021-06-05 05:24:01,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:24:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2021-06-05 05:24:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 896. [2021-06-05 05:24:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.987709497206704) internal successors, (1779), 895 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1779 transitions. [2021-06-05 05:24:01,223 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1779 transitions. Word has length 34 [2021-06-05 05:24:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:01,223 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 1779 transitions. [2021-06-05 05:24:01,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1779 transitions. [2021-06-05 05:24:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:01,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:01,224 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:01,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 05:24:01,425 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:01,425 INFO L82 PathProgramCache]: Analyzing trace with hash 431279499, now seen corresponding path program 57 times [2021-06-05 05:24:01,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:01,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62473878] [2021-06-05 05:24:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:01,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:01,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62473878] [2021-06-05 05:24:01,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62473878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:01,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490831266] [2021-06-05 05:24:01,634 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 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 05:24:01,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:24:01,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:01,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:01,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:02,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:02,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:02,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:02,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:02,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:02,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:02,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:02,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:02,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490831266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:02,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:02,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 05:24:02,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152542440] [2021-06-05 05:24:02,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:02,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:02,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:02,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:02,124 INFO L87 Difference]: Start difference. First operand 896 states and 1779 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:02,423 INFO L93 Difference]: Finished difference Result 1846 states and 3731 transitions. [2021-06-05 05:24:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:24:02,423 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:02,424 INFO L225 Difference]: With dead ends: 1846 [2021-06-05 05:24:02,424 INFO L226 Difference]: Without dead ends: 1801 [2021-06-05 05:24:02,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 594.7ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:24:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-06-05 05:24:02,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 926. [2021-06-05 05:24:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9891891891891893) internal successors, (1840), 925 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1840 transitions. [2021-06-05 05:24:02,435 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1840 transitions. Word has length 36 [2021-06-05 05:24:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:02,436 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1840 transitions. [2021-06-05 05:24:02,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:02,436 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1840 transitions. [2021-06-05 05:24:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:02,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:02,437 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:02,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:02,637 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:02,637 INFO L82 PathProgramCache]: Analyzing trace with hash 971114529, now seen corresponding path program 58 times [2021-06-05 05:24:02,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:02,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355894436] [2021-06-05 05:24:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:02,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:02,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355894436] [2021-06-05 05:24:02,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355894436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:02,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601085891] [2021-06-05 05:24:02,849 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 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 05:24:02,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:02,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:02,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:02,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:03,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:03,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:03,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:03,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:03,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:03,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:03,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:03,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:03,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:03,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:03,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601085891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:03,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:03,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 05:24:03,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697344723] [2021-06-05 05:24:03,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:03,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:03,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:03,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:03,337 INFO L87 Difference]: Start difference. First operand 926 states and 1840 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:03,724 INFO L93 Difference]: Finished difference Result 2095 states and 4241 transitions. [2021-06-05 05:24:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:03,726 INFO L225 Difference]: With dead ends: 2095 [2021-06-05 05:24:03,726 INFO L226 Difference]: Without dead ends: 2049 [2021-06-05 05:24:03,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 623.7ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:24:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-05 05:24:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1030. [2021-06-05 05:24:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.0136054421768708) internal successors, (2072), 1029 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2072 transitions. [2021-06-05 05:24:03,736 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2072 transitions. Word has length 36 [2021-06-05 05:24:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:03,737 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 2072 transitions. [2021-06-05 05:24:03,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2072 transitions. [2021-06-05 05:24:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:03,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:03,738 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:03,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 05:24:03,938 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:03,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1302699637, now seen corresponding path program 59 times [2021-06-05 05:24:03,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:03,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409416890] [2021-06-05 05:24:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:04,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:04,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409416890] [2021-06-05 05:24:04,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409416890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:04,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474270476] [2021-06-05 05:24:04,178 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 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 05:24:04,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:24:04,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:04,203 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:24:04,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:04,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:04,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:04,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:04,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:04,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:04,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:04,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:04,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:04,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:04,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:04,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474270476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:04,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:04,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 05:24:04,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215022716] [2021-06-05 05:24:04,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:04,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:04,672 INFO L87 Difference]: Start difference. First operand 1030 states and 2072 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:05,066 INFO L93 Difference]: Finished difference Result 1598 states and 3240 transitions. [2021-06-05 05:24:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:24:05,067 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:05,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:05,068 INFO L225 Difference]: With dead ends: 1598 [2021-06-05 05:24:05,068 INFO L226 Difference]: Without dead ends: 1576 [2021-06-05 05:24:05,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:24:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-05 05:24:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1036. [2021-06-05 05:24:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.0144927536231885) internal successors, (2085), 1035 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2085 transitions. [2021-06-05 05:24:05,077 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2085 transitions. Word has length 36 [2021-06-05 05:24:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:05,077 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2085 transitions. [2021-06-05 05:24:05,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2085 transitions. [2021-06-05 05:24:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:05,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:05,078 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:05,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:05,279 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1027051523, now seen corresponding path program 60 times [2021-06-05 05:24:05,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:05,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891238861] [2021-06-05 05:24:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:05,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:05,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891238861] [2021-06-05 05:24:05,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891238861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:05,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362090228] [2021-06-05 05:24:05,568 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 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 05:24:05,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:24:05,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:05,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:05,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:06,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:06,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:06,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:06,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:06,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:06,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:06,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:06,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:06,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:06,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:06,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362090228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:06,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:06,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 05:24:06,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052538061] [2021-06-05 05:24:06,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:24:06,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:06,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:24:06,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:06,093 INFO L87 Difference]: Start difference. First operand 1036 states and 2085 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:06,490 INFO L93 Difference]: Finished difference Result 2409 states and 4930 transitions. [2021-06-05 05:24:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:24:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:06,492 INFO L225 Difference]: With dead ends: 2409 [2021-06-05 05:24:06,492 INFO L226 Difference]: Without dead ends: 2332 [2021-06-05 05:24:06,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 703.7ms TimeCoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:24:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-05 05:24:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1084. [2021-06-05 05:24:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.0083102493074794) internal successors, (2175), 1083 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2175 transitions. [2021-06-05 05:24:06,504 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2175 transitions. Word has length 36 [2021-06-05 05:24:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:06,504 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 2175 transitions. [2021-06-05 05:24:06,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2175 transitions. [2021-06-05 05:24:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:06,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:06,505 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:06,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 05:24:06,706 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1566886553, now seen corresponding path program 61 times [2021-06-05 05:24:06,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:06,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075010089] [2021-06-05 05:24:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:06,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:06,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075010089] [2021-06-05 05:24:06,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075010089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:06,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167387035] [2021-06-05 05:24:06,964 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:24:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:07,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:07,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:07,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:07,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:07,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:07,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:07,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:07,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:07,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:07,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:07,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:07,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:07,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167387035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:07,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:07,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 05:24:07,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610565009] [2021-06-05 05:24:07,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:24:07,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:07,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:24:07,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:07,484 INFO L87 Difference]: Start difference. First operand 1084 states and 2175 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:08,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:08,110 INFO L93 Difference]: Finished difference Result 2544 states and 5180 transitions. [2021-06-05 05:24:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:24:08,111 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:08,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:08,113 INFO L225 Difference]: With dead ends: 2544 [2021-06-05 05:24:08,113 INFO L226 Difference]: Without dead ends: 2466 [2021-06-05 05:24:08,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 693.9ms TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:24:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-05 05:24:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 1207. [2021-06-05 05:24:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-06-05 05:24:08,126 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-06-05 05:24:08,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:08,127 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-06-05 05:24:08,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-06-05 05:24:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:08,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:08,128 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:08,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:08,341 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash -706927613, now seen corresponding path program 62 times [2021-06-05 05:24:08,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:08,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833254832] [2021-06-05 05:24:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:08,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:08,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833254832] [2021-06-05 05:24:08,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833254832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:08,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749286255] [2021-06-05 05:24:08,583 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 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 05:24:08,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:08,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:08,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:08,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:09,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:09,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:09,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:09,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:09,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:09,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:09,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:09,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749286255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:09,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:09,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 05:24:09,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197342035] [2021-06-05 05:24:09,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:24:09,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:09,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:24:09,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:09,121 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:09,750 INFO L93 Difference]: Finished difference Result 2101 states and 4239 transitions. [2021-06-05 05:24:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:24:09,751 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:09,752 INFO L225 Difference]: With dead ends: 2101 [2021-06-05 05:24:09,753 INFO L226 Difference]: Without dead ends: 2073 [2021-06-05 05:24:09,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 662.2ms TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:24:09,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-06-05 05:24:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1207. [2021-06-05 05:24:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-06-05 05:24:09,765 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-06-05 05:24:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:09,765 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-06-05 05:24:09,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-06-05 05:24:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:09,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:09,767 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:09,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 05:24:09,967 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash 623181831, now seen corresponding path program 63 times [2021-06-05 05:24:09,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:09,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560194181] [2021-06-05 05:24:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:24:10,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:10,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560194181] [2021-06-05 05:24:10,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560194181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:10,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438204294] [2021-06-05 05:24:10,173 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 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 05:24:10,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:24:10,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:10,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:10,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:10,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:10,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:10,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:10,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:10,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:10,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:10,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:10,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:10,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:10,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438204294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:10,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:10,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 28 [2021-06-05 05:24:10,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218793050] [2021-06-05 05:24:10,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:24:10,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:10,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:24:10,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:24:10,648 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:11,042 INFO L93 Difference]: Finished difference Result 2018 states and 4044 transitions. [2021-06-05 05:24:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:11,042 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:11,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:11,044 INFO L225 Difference]: With dead ends: 2018 [2021-06-05 05:24:11,044 INFO L226 Difference]: Without dead ends: 1879 [2021-06-05 05:24:11,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 670.9ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:24:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-06-05 05:24:11,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1350. [2021-06-05 05:24:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.9940696812453669) internal successors, (2690), 1349 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2690 transitions. [2021-06-05 05:24:11,057 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2690 transitions. Word has length 36 [2021-06-05 05:24:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:11,057 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 2690 transitions. [2021-06-05 05:24:11,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:11,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2690 transitions. [2021-06-05 05:24:11,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:11,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:11,058 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:11,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 05:24:11,273 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:11,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:11,273 INFO L82 PathProgramCache]: Analyzing trace with hash 603825257, now seen corresponding path program 64 times [2021-06-05 05:24:11,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:11,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685026451] [2021-06-05 05:24:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:11,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:11,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685026451] [2021-06-05 05:24:11,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685026451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:11,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358964364] [2021-06-05 05:24:11,514 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 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 05:24:11,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:11,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:11,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:11,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:11,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:11,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:11,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:11,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:11,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:11,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:12,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358964364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:12,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:12,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 05:24:12,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886380223] [2021-06-05 05:24:12,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:12,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:12,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:12,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:12,017 INFO L87 Difference]: Start difference. First operand 1350 states and 2690 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:12,412 INFO L93 Difference]: Finished difference Result 2339 states and 4747 transitions. [2021-06-05 05:24:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:12,415 INFO L225 Difference]: With dead ends: 2339 [2021-06-05 05:24:12,415 INFO L226 Difference]: Without dead ends: 2297 [2021-06-05 05:24:12,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 669.0ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:24:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-06-05 05:24:12,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1365. [2021-06-05 05:24:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-06-05 05:24:12,431 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-06-05 05:24:12,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:12,432 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-06-05 05:24:12,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-06-05 05:24:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:12,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:12,433 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:12,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 05:24:12,637 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:12,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:12,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1455840993, now seen corresponding path program 65 times [2021-06-05 05:24:12,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:12,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085243874] [2021-06-05 05:24:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:12,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:12,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085243874] [2021-06-05 05:24:12,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085243874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:12,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841281822] [2021-06-05 05:24:12,888 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 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 05:24:12,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:24:12,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:12,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:12,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:13,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:13,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:13,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:13,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:13,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-05 05:24:13,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:13,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:13,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:13,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 05:24:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:13,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841281822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:13,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:13,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:24:13,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602765672] [2021-06-05 05:24:13,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:24:13,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:13,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:24:13,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:24:13,463 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:14,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:14,101 INFO L93 Difference]: Finished difference Result 2510 states and 5065 transitions. [2021-06-05 05:24:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:24:14,103 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:14,105 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 05:24:14,105 INFO L226 Difference]: Without dead ends: 2465 [2021-06-05 05:24:14,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 768.3ms TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:24:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-05 05:24:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1365. [2021-06-05 05:24:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-06-05 05:24:14,119 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-06-05 05:24:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:14,120 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-06-05 05:24:14,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-06-05 05:24:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:14,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:14,121 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:14,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:14,321 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:14,322 INFO L82 PathProgramCache]: Analyzing trace with hash -817973173, now seen corresponding path program 66 times [2021-06-05 05:24:14,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:14,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8590253] [2021-06-05 05:24:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:14,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:14,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8590253] [2021-06-05 05:24:14,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8590253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:14,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273036928] [2021-06-05 05:24:14,558 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 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 05:24:14,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:24:14,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:14,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:14,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:15,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:15,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:15,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:15,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:15,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 37 [2021-06-05 05:24:15,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:15,374 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-06-05 05:24:15,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:15,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-06-05 05:24:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:15,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273036928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:15,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:15,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 05:24:15,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568411634] [2021-06-05 05:24:15,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:24:15,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:15,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:24:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:15,412 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:18,244 INFO L93 Difference]: Finished difference Result 2490 states and 5033 transitions. [2021-06-05 05:24:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:24:18,244 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:18,246 INFO L225 Difference]: With dead ends: 2490 [2021-06-05 05:24:18,246 INFO L226 Difference]: Without dead ends: 2398 [2021-06-05 05:24:18,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1781.4ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:24:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-06-05 05:24:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1439. [2021-06-05 05:24:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.0180806675938805) internal successors, (2902), 1438 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2902 transitions. [2021-06-05 05:24:18,261 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2902 transitions. Word has length 36 [2021-06-05 05:24:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:18,261 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 2902 transitions. [2021-06-05 05:24:18,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2902 transitions. [2021-06-05 05:24:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:18,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:18,262 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:18,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:18,464 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:18,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1925362883, now seen corresponding path program 67 times [2021-06-05 05:24:18,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:18,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928425842] [2021-06-05 05:24:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:18,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:18,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928425842] [2021-06-05 05:24:18,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928425842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:18,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872633614] [2021-06-05 05:24:18,744 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 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 05:24:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:18,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:18,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:19,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:19,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:19,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:19,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:19,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:19,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:19,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:19,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:19,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:19,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:19,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872633614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:19,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:19,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 05:24:19,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830703447] [2021-06-05 05:24:19,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:24:19,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:19,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:24:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:19,276 INFO L87 Difference]: Start difference. First operand 1439 states and 2902 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:19,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:19,708 INFO L93 Difference]: Finished difference Result 2160 states and 4385 transitions. [2021-06-05 05:24:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:24:19,708 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:19,710 INFO L225 Difference]: With dead ends: 2160 [2021-06-05 05:24:19,710 INFO L226 Difference]: Without dead ends: 2137 [2021-06-05 05:24:19,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 663.3ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:24:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-06-05 05:24:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1445. [2021-06-05 05:24:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.018698060941828) internal successors, (2915), 1444 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2915 transitions. [2021-06-05 05:24:19,723 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2915 transitions. Word has length 36 [2021-06-05 05:24:19,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:19,723 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 2915 transitions. [2021-06-05 05:24:19,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2915 transitions. [2021-06-05 05:24:19,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:19,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:19,724 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:19,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:19,925 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:19,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:19,925 INFO L82 PathProgramCache]: Analyzing trace with hash -325263507, now seen corresponding path program 68 times [2021-06-05 05:24:19,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:19,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257616687] [2021-06-05 05:24:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:20,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:20,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257616687] [2021-06-05 05:24:20,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257616687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:20,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642455644] [2021-06-05 05:24:20,114 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 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 05:24:20,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:20,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:20,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:20,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:20,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:20,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:20,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:20,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:20,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:20,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:20,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:20,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:20,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:20,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642455644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:20,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:20,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 05:24:20,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314300143] [2021-06-05 05:24:20,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:24:20,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:20,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:24:20,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:24:20,573 INFO L87 Difference]: Start difference. First operand 1445 states and 2915 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:21,032 INFO L93 Difference]: Finished difference Result 2272 states and 4614 transitions. [2021-06-05 05:24:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:24:21,032 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:21,034 INFO L225 Difference]: With dead ends: 2272 [2021-06-05 05:24:21,034 INFO L226 Difference]: Without dead ends: 2213 [2021-06-05 05:24:21,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 487.5ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:24:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-06-05 05:24:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1517. [2021-06-05 05:24:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.0118733509234827) internal successors, (3050), 1516 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 3050 transitions. [2021-06-05 05:24:21,047 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 3050 transitions. Word has length 36 [2021-06-05 05:24:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:21,047 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 3050 transitions. [2021-06-05 05:24:21,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 3050 transitions. [2021-06-05 05:24:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:21,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:21,048 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:21,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 05:24:21,249 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:21,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:21,249 INFO L82 PathProgramCache]: Analyzing trace with hash 214571523, now seen corresponding path program 69 times [2021-06-05 05:24:21,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:21,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443792368] [2021-06-05 05:24:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:21,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:21,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443792368] [2021-06-05 05:24:21,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443792368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:21,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81948209] [2021-06-05 05:24:21,479 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 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 05:24:21,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:24:21,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:21,505 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:21,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:21,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:21,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:21,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:21,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:21,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:21,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:21,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:21,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:21,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:21,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:21,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81948209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:21,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:21,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 05:24:21,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108582863] [2021-06-05 05:24:21,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:24:21,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:21,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:24:21,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:24:21,967 INFO L87 Difference]: Start difference. First operand 1517 states and 3050 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:22,439 INFO L93 Difference]: Finished difference Result 2702 states and 5500 transitions. [2021-06-05 05:24:22,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:24:22,440 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:22,442 INFO L225 Difference]: With dead ends: 2702 [2021-06-05 05:24:22,442 INFO L226 Difference]: Without dead ends: 2605 [2021-06-05 05:24:22,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 561.5ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:24:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-06-05 05:24:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1571. [2021-06-05 05:24:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-06-05 05:24:22,458 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-06-05 05:24:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:22,458 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-06-05 05:24:22,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-06-05 05:24:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:22,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:22,460 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:22,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:22,665 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2059242643, now seen corresponding path program 70 times [2021-06-05 05:24:22,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:22,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024076635] [2021-06-05 05:24:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:22,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:22,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024076635] [2021-06-05 05:24:22,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024076635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:22,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530155437] [2021-06-05 05:24:22,882 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 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 05:24:22,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:22,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:22,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:22,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:23,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:23,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:23,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:23,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:23,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:23,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:23,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:23,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530155437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:23,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:23,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 05:24:23,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10911967] [2021-06-05 05:24:23,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:24:23,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:23,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:24:23,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:24:23,363 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:23,701 INFO L93 Difference]: Finished difference Result 2210 states and 4470 transitions. [2021-06-05 05:24:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:24:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:23,704 INFO L225 Difference]: With dead ends: 2210 [2021-06-05 05:24:23,704 INFO L226 Difference]: Without dead ends: 2188 [2021-06-05 05:24:23,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 542.5ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:24:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-06-05 05:24:23,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1571. [2021-06-05 05:24:23,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-06-05 05:24:23,718 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-06-05 05:24:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:23,719 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-06-05 05:24:23,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-06-05 05:24:23,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:23,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:23,720 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:23,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:23,933 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash -729133199, now seen corresponding path program 71 times [2021-06-05 05:24:23,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:23,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800746301] [2021-06-05 05:24:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:24,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:24,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800746301] [2021-06-05 05:24:24,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800746301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:24,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307700241] [2021-06-05 05:24:24,137 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 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 05:24:24,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:24:24,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:24,164 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:24:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:24,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:24,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:24,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:24,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:24,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:24,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:24,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:24,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:24,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:24,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:24,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307700241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:24,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:24,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 05:24:24,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507172291] [2021-06-05 05:24:24,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:24:24,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:24:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:24:24,691 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:25,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:25,229 INFO L93 Difference]: Finished difference Result 2485 states and 5026 transitions. [2021-06-05 05:24:25,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:24:25,229 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:25,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:25,231 INFO L225 Difference]: With dead ends: 2485 [2021-06-05 05:24:25,231 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 05:24:25,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 691.1ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 05:24:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1582. [2021-06-05 05:24:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.001897533206831) internal successors, (3165), 1581 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3165 transitions. [2021-06-05 05:24:25,245 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3165 transitions. Word has length 36 [2021-06-05 05:24:25,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:25,245 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3165 transitions. [2021-06-05 05:24:25,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:25,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3165 transitions. [2021-06-05 05:24:25,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:25,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:25,246 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:25,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:25,447 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:25,447 INFO L82 PathProgramCache]: Analyzing trace with hash 103525963, now seen corresponding path program 72 times [2021-06-05 05:24:25,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:25,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872665305] [2021-06-05 05:24:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:25,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:25,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872665305] [2021-06-05 05:24:25,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872665305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:25,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567634887] [2021-06-05 05:24:25,677 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 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 05:24:25,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:24:25,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:25,703 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:26,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:26,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:26,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:26,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:26,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:26,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:26,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:26,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:26,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:26,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:26,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567634887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:26,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:26,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:26,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148602960] [2021-06-05 05:24:26,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:26,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:26,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:26,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:26,163 INFO L87 Difference]: Start difference. First operand 1582 states and 3165 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:26,464 INFO L93 Difference]: Finished difference Result 2739 states and 5530 transitions. [2021-06-05 05:24:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:26,464 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:26,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:26,466 INFO L225 Difference]: With dead ends: 2739 [2021-06-05 05:24:26,466 INFO L226 Difference]: Without dead ends: 2676 [2021-06-05 05:24:26,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 565.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:26,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-06-05 05:24:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1621. [2021-06-05 05:24:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.0) internal successors, (3240), 1620 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3240 transitions. [2021-06-05 05:24:26,481 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3240 transitions. Word has length 36 [2021-06-05 05:24:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:26,482 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3240 transitions. [2021-06-05 05:24:26,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3240 transitions. [2021-06-05 05:24:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:26,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:26,483 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:26,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 05:24:26,683 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:26,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2124679093, now seen corresponding path program 73 times [2021-06-05 05:24:26,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:26,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615317455] [2021-06-05 05:24:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:26,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:26,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615317455] [2021-06-05 05:24:26,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615317455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:26,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658595203] [2021-06-05 05:24:26,901 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 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 05:24:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:26,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:27,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:27,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:27,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:27,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:27,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:27,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:27,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:27,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:27,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:27,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:27,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658595203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:27,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:27,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:27,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332030740] [2021-06-05 05:24:27,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:27,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:27,404 INFO L87 Difference]: Start difference. First operand 1621 states and 3240 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:28,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:28,012 INFO L93 Difference]: Finished difference Result 2343 states and 4717 transitions. [2021-06-05 05:24:28,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:24:28,012 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:28,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:28,014 INFO L225 Difference]: With dead ends: 2343 [2021-06-05 05:24:28,014 INFO L226 Difference]: Without dead ends: 2321 [2021-06-05 05:24:28,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 569.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2021-06-05 05:24:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1627. [2021-06-05 05:24:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-06-05 05:24:28,028 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-06-05 05:24:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:28,028 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-06-05 05:24:28,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-06-05 05:24:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:28,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:28,029 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:28,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:28,230 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:28,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:28,230 INFO L82 PathProgramCache]: Analyzing trace with hash 573047853, now seen corresponding path program 74 times [2021-06-05 05:24:28,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:28,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754990519] [2021-06-05 05:24:28,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:28,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:28,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754990519] [2021-06-05 05:24:28,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754990519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:28,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907238168] [2021-06-05 05:24:28,467 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 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 05:24:28,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:28,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:28,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:24:28,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:28,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:28,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:28,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-06-05 05:24:28,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:28,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:28,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:28,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 05:24:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:28,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907238168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:28,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:28,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:28,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211098808] [2021-06-05 05:24:28,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:28,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:28,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:28,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:28,966 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:29,350 INFO L93 Difference]: Finished difference Result 2287 states and 4610 transitions. [2021-06-05 05:24:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:24:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:29,352 INFO L225 Difference]: With dead ends: 2287 [2021-06-05 05:24:29,352 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 05:24:29,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 584.0ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 05:24:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1627. [2021-06-05 05:24:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-06-05 05:24:29,367 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-06-05 05:24:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:29,367 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-06-05 05:24:29,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-06-05 05:24:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:29,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:29,368 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:29,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 05:24:29,569 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:29,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1638712185, now seen corresponding path program 75 times [2021-06-05 05:24:29,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:29,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312555271] [2021-06-05 05:24:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:29,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:29,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312555271] [2021-06-05 05:24:29,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312555271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:29,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003779813] [2021-06-05 05:24:29,764 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 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 05:24:29,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:24:29,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:29,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:29,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:30,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:30,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:30,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:30,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:30,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:30,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:30,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:30,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:30,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:30,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:30,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003779813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:30,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:30,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 05:24:30,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704973516] [2021-06-05 05:24:30,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:24:30,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:30,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:24:30,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:24:30,242 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:30,577 INFO L93 Difference]: Finished difference Result 2567 states and 5154 transitions. [2021-06-05 05:24:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:24:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:30,579 INFO L225 Difference]: With dead ends: 2567 [2021-06-05 05:24:30,579 INFO L226 Difference]: Without dead ends: 2346 [2021-06-05 05:24:30,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 592.9ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-05 05:24:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1699. [2021-06-05 05:24:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 1.9976442873969376) internal successors, (3392), 1698 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3392 transitions. [2021-06-05 05:24:30,595 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3392 transitions. Word has length 36 [2021-06-05 05:24:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:30,595 INFO L482 AbstractCegarLoop]: Abstraction has 1699 states and 3392 transitions. [2021-06-05 05:24:30,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3392 transitions. [2021-06-05 05:24:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:30,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:30,597 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:30,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:30,797 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1182283007, now seen corresponding path program 76 times [2021-06-05 05:24:30,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:30,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093334240] [2021-06-05 05:24:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:31,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:31,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093334240] [2021-06-05 05:24:31,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093334240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:31,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351243276] [2021-06-05 05:24:31,015 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 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 05:24:31,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:31,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:31,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:31,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:31,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:31,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:31,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:31,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:31,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:31,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:31,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:31,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:31,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:31,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:31,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351243276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:31,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:31,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 05:24:31,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532863370] [2021-06-05 05:24:31,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:24:31,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:31,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:24:31,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:24:31,527 INFO L87 Difference]: Start difference. First operand 1699 states and 3392 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:31,894 INFO L93 Difference]: Finished difference Result 3110 states and 6274 transitions. [2021-06-05 05:24:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:24:31,894 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:31,896 INFO L225 Difference]: With dead ends: 3110 [2021-06-05 05:24:31,896 INFO L226 Difference]: Without dead ends: 3051 [2021-06-05 05:24:31,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 561.1ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:24:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-05 05:24:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 1690. [2021-06-05 05:24:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.9964476021314388) internal successors, (3372), 1689 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 3372 transitions. [2021-06-05 05:24:31,915 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 3372 transitions. Word has length 36 [2021-06-05 05:24:31,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:31,915 INFO L482 AbstractCegarLoop]: Abstraction has 1690 states and 3372 transitions. [2021-06-05 05:24:31,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 3372 transitions. [2021-06-05 05:24:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:31,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:31,917 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:32,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:32,117 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:32,118 INFO L82 PathProgramCache]: Analyzing trace with hash -806053023, now seen corresponding path program 77 times [2021-06-05 05:24:32,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:32,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282647933] [2021-06-05 05:24:32,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:32,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:32,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282647933] [2021-06-05 05:24:32,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282647933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:32,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957905926] [2021-06-05 05:24:32,335 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 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 05:24:32,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:24:32,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:32,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:32,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:32,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:32,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:32,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:32,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:32,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:32,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:32,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:32,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:32,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:32,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:32,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957905926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:32,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:32,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:32,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117773291] [2021-06-05 05:24:32,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:32,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:32,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:32,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:32,846 INFO L87 Difference]: Start difference. First operand 1690 states and 3372 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:33,114 INFO L93 Difference]: Finished difference Result 2909 states and 5872 transitions. [2021-06-05 05:24:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:33,115 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:33,117 INFO L225 Difference]: With dead ends: 2909 [2021-06-05 05:24:33,117 INFO L226 Difference]: Without dead ends: 2846 [2021-06-05 05:24:33,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 565.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-05 05:24:33,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1717. [2021-06-05 05:24:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 1.9965034965034965) internal successors, (3426), 1716 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3426 transitions. [2021-06-05 05:24:33,135 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3426 transitions. Word has length 36 [2021-06-05 05:24:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:33,135 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 3426 transitions. [2021-06-05 05:24:33,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3426 transitions. [2021-06-05 05:24:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:33,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:33,137 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:33,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:33,351 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:33,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1215100107, now seen corresponding path program 78 times [2021-06-05 05:24:33,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:33,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775900530] [2021-06-05 05:24:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:33,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:33,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775900530] [2021-06-05 05:24:33,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775900530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:33,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208503430] [2021-06-05 05:24:33,596 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 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 05:24:33,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:24:33,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:33,621 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:33,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:34,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:34,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:34,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:34,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:34,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:34,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:34,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:34,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:34,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:34,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208503430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:34,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:34,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:34,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24684983] [2021-06-05 05:24:34,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:34,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:34,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:34,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:34,123 INFO L87 Difference]: Start difference. First operand 1717 states and 3426 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:34,499 INFO L93 Difference]: Finished difference Result 2369 states and 4761 transitions. [2021-06-05 05:24:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:24:34,500 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:34,502 INFO L225 Difference]: With dead ends: 2369 [2021-06-05 05:24:34,502 INFO L226 Difference]: Without dead ends: 2347 [2021-06-05 05:24:34,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 614.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-06-05 05:24:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1726. [2021-06-05 05:24:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-06-05 05:24:34,518 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-06-05 05:24:34,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:34,518 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-06-05 05:24:34,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-06-05 05:24:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:34,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:34,520 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:34,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:34,720 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:34,720 INFO L82 PathProgramCache]: Analyzing trace with hash -336531133, now seen corresponding path program 79 times [2021-06-05 05:24:34,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:34,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987260366] [2021-06-05 05:24:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:34,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:34,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987260366] [2021-06-05 05:24:34,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987260366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:34,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257274632] [2021-06-05 05:24:34,942 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 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 05:24:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:34,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:34,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:35,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:35,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:35,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:35,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:35,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:35,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:35,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:35,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:35,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:35,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257274632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:35,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:35,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:35,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253151594] [2021-06-05 05:24:35,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:35,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:35,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:35,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:35,456 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:35,808 INFO L93 Difference]: Finished difference Result 2328 states and 4682 transitions. [2021-06-05 05:24:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:24:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:35,810 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 05:24:35,810 INFO L226 Difference]: Without dead ends: 2305 [2021-06-05 05:24:35,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 571.7ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-05 05:24:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1726. [2021-06-05 05:24:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-06-05 05:24:35,858 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-06-05 05:24:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:35,858 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-06-05 05:24:35,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-06-05 05:24:35,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:35,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:35,860 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:36,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:36,076 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:36,076 INFO L82 PathProgramCache]: Analyzing trace with hash 666409005, now seen corresponding path program 80 times [2021-06-05 05:24:36,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:36,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679601573] [2021-06-05 05:24:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:36,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:36,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679601573] [2021-06-05 05:24:36,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679601573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:36,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431606813] [2021-06-05 05:24:36,302 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 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 05:24:36,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:36,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:36,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:24:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:36,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:36,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:36,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:36,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:36,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:36,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-06-05 05:24:36,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:36,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:36,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:36,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 05:24:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:36,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431606813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:36,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:36,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:36,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004511369] [2021-06-05 05:24:36,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:36,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:36,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:36,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:36,792 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:37,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:37,339 INFO L93 Difference]: Finished difference Result 2252 states and 4526 transitions. [2021-06-05 05:24:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:24:37,340 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:37,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:37,341 INFO L225 Difference]: With dead ends: 2252 [2021-06-05 05:24:37,341 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 05:24:37,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 563.0ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 05:24:37,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1729. [2021-06-05 05:24:37,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.9965277777777777) internal successors, (3450), 1728 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 3450 transitions. [2021-06-05 05:24:37,357 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 3450 transitions. Word has length 36 [2021-06-05 05:24:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:37,357 INFO L482 AbstractCegarLoop]: Abstraction has 1729 states and 3450 transitions. [2021-06-05 05:24:37,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 3450 transitions. [2021-06-05 05:24:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:37,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:37,359 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:37,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:37,559 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:37,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:37,559 INFO L82 PathProgramCache]: Analyzing trace with hash -30986797, now seen corresponding path program 81 times [2021-06-05 05:24:37,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:37,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748212841] [2021-06-05 05:24:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:37,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:37,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748212841] [2021-06-05 05:24:37,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748212841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:37,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697129272] [2021-06-05 05:24:37,774 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 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 05:24:37,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:24:37,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:37,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:37,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:38,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:38,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:38,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:38,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:38,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:38,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:38,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:38,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:38,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:38,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697129272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:38,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:38,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 05:24:38,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98386651] [2021-06-05 05:24:38,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:38,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:38,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:38,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:38,287 INFO L87 Difference]: Start difference. First operand 1729 states and 3450 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:38,736 INFO L93 Difference]: Finished difference Result 3640 states and 7355 transitions. [2021-06-05 05:24:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:38,736 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:38,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:38,739 INFO L225 Difference]: With dead ends: 3640 [2021-06-05 05:24:38,739 INFO L226 Difference]: Without dead ends: 3597 [2021-06-05 05:24:38,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 652.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:24:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-06-05 05:24:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 1800. [2021-06-05 05:24:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 1.991106170094497) internal successors, (3582), 1799 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3582 transitions. [2021-06-05 05:24:38,759 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3582 transitions. Word has length 36 [2021-06-05 05:24:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:38,759 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 3582 transitions. [2021-06-05 05:24:38,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3582 transitions. [2021-06-05 05:24:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:38,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:38,761 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:38,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:38,962 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:38,962 INFO L82 PathProgramCache]: Analyzing trace with hash 564785227, now seen corresponding path program 82 times [2021-06-05 05:24:38,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:38,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457882638] [2021-06-05 05:24:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:39,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:39,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457882638] [2021-06-05 05:24:39,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457882638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:39,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503706037] [2021-06-05 05:24:39,218 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 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 05:24:39,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:39,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:39,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:39,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:39,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:39,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:39,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:39,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:39,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:39,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:39,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:39,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:39,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:39,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:39,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503706037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:39,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:39,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 05:24:39,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055231475] [2021-06-05 05:24:39,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:24:39,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:39,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:24:39,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:39,740 INFO L87 Difference]: Start difference. First operand 1800 states and 3582 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:40,447 INFO L93 Difference]: Finished difference Result 3718 states and 7520 transitions. [2021-06-05 05:24:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:24:40,447 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:40,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:40,451 INFO L225 Difference]: With dead ends: 3718 [2021-06-05 05:24:40,451 INFO L226 Difference]: Without dead ends: 3670 [2021-06-05 05:24:40,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 724.9ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:24:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-06-05 05:24:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 1884. [2021-06-05 05:24:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 1.9867233138608604) internal successors, (3741), 1883 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 3741 transitions. [2021-06-05 05:24:40,474 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 3741 transitions. Word has length 36 [2021-06-05 05:24:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:40,474 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 3741 transitions. [2021-06-05 05:24:40,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 3741 transitions. [2021-06-05 05:24:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:40,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:40,476 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:40,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 05:24:40,692 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash 453739667, now seen corresponding path program 83 times [2021-06-05 05:24:40,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:40,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134119797] [2021-06-05 05:24:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:40,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:40,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134119797] [2021-06-05 05:24:40,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134119797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:40,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249118116] [2021-06-05 05:24:40,943 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 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 05:24:40,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:24:40,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:40,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:24:40,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:41,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:41,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:41,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:41,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:41,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:41,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:41,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:41,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:41,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:41,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249118116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:41,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:41,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 05:24:41,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601667718] [2021-06-05 05:24:41,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:24:41,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:24:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:41,470 INFO L87 Difference]: Start difference. First operand 1884 states and 3741 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:42,316 INFO L93 Difference]: Finished difference Result 3721 states and 7510 transitions. [2021-06-05 05:24:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:24:42,316 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:42,319 INFO L225 Difference]: With dead ends: 3721 [2021-06-05 05:24:42,319 INFO L226 Difference]: Without dead ends: 3678 [2021-06-05 05:24:42,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 748.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:24:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2021-06-05 05:24:42,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 1956. [2021-06-05 05:24:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 1.984143222506394) internal successors, (3879), 1955 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3879 transitions. [2021-06-05 05:24:42,339 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3879 transitions. Word has length 36 [2021-06-05 05:24:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:42,339 INFO L482 AbstractCegarLoop]: Abstraction has 1956 states and 3879 transitions. [2021-06-05 05:24:42,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3879 transitions. [2021-06-05 05:24:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:42,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:42,341 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:42,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:42,541 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:42,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:42,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1097891573, now seen corresponding path program 84 times [2021-06-05 05:24:42,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:42,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663716886] [2021-06-05 05:24:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:42,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:42,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663716886] [2021-06-05 05:24:42,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663716886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:42,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396979101] [2021-06-05 05:24:42,778 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 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 05:24:42,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:24:42,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:42,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:42,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:43,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:43,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:43,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:43,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:43,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:43,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:43,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:43,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:43,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:43,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:43,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396979101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:43,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:43,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 05:24:43,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706470359] [2021-06-05 05:24:43,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:24:43,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:43,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:24:43,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:43,311 INFO L87 Difference]: Start difference. First operand 1956 states and 3879 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:44,080 INFO L93 Difference]: Finished difference Result 3689 states and 7457 transitions. [2021-06-05 05:24:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:24:44,081 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:44,084 INFO L225 Difference]: With dead ends: 3689 [2021-06-05 05:24:44,084 INFO L226 Difference]: Without dead ends: 3644 [2021-06-05 05:24:44,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 759.8ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:24:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-06-05 05:24:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 1973. [2021-06-05 05:24:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.9852941176470589) internal successors, (3915), 1972 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 3915 transitions. [2021-06-05 05:24:44,109 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 3915 transitions. Word has length 36 [2021-06-05 05:24:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:44,109 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 3915 transitions. [2021-06-05 05:24:44,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 3915 transitions. [2021-06-05 05:24:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:44,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:44,110 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:44,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 05:24:44,311 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:44,312 INFO L82 PathProgramCache]: Analyzing trace with hash -787529803, now seen corresponding path program 85 times [2021-06-05 05:24:44,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:44,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890622138] [2021-06-05 05:24:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:44,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:44,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890622138] [2021-06-05 05:24:44,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890622138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:44,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133621715] [2021-06-05 05:24:44,508 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 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 05:24:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:44,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:44,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:44,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:44,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:44,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:44,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:44,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:44,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:44,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:44,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:44,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:44,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133621715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:44,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:44,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 05:24:44,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847297742] [2021-06-05 05:24:44,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:24:44,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:44,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:24:44,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:24:44,998 INFO L87 Difference]: Start difference. First operand 1973 states and 3915 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:45,353 INFO L93 Difference]: Finished difference Result 3068 states and 6162 transitions. [2021-06-05 05:24:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:24:45,353 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:45,356 INFO L225 Difference]: With dead ends: 3068 [2021-06-05 05:24:45,356 INFO L226 Difference]: Without dead ends: 3006 [2021-06-05 05:24:45,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-06-05 05:24:45,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 1967. [2021-06-05 05:24:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 1.9852492370295016) internal successors, (3903), 1966 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3903 transitions. [2021-06-05 05:24:45,374 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3903 transitions. Word has length 36 [2021-06-05 05:24:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:45,374 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 3903 transitions. [2021-06-05 05:24:45,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3903 transitions. [2021-06-05 05:24:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:45,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:45,375 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:45,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:45,591 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:45,591 INFO L82 PathProgramCache]: Analyzing trace with hash -898575363, now seen corresponding path program 86 times [2021-06-05 05:24:45,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:45,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013177493] [2021-06-05 05:24:45,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:45,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:45,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013177493] [2021-06-05 05:24:45,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013177493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:45,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723069203] [2021-06-05 05:24:45,811 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:24:45,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:45,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:45,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:45,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:46,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:46,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:46,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:46,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:46,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:46,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:46,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:46,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:46,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723069203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:46,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:46,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:46,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200338151] [2021-06-05 05:24:46,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:46,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:46,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:46,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:46,330 INFO L87 Difference]: Start difference. First operand 1967 states and 3903 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:46,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:46,903 INFO L93 Difference]: Finished difference Result 3053 states and 6129 transitions. [2021-06-05 05:24:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:46,903 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:46,906 INFO L225 Difference]: With dead ends: 3053 [2021-06-05 05:24:46,906 INFO L226 Difference]: Without dead ends: 2991 [2021-06-05 05:24:46,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-05 05:24:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1964. [2021-06-05 05:24:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 1.9852266938359653) internal successors, (3897), 1963 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 3897 transitions. [2021-06-05 05:24:46,924 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 3897 transitions. Word has length 36 [2021-06-05 05:24:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:46,924 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 3897 transitions. [2021-06-05 05:24:46,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 3897 transitions. [2021-06-05 05:24:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:46,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:46,926 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:47,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:47,126 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:47,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:47,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1844760693, now seen corresponding path program 87 times [2021-06-05 05:24:47,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:47,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478699652] [2021-06-05 05:24:47,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:47,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:47,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478699652] [2021-06-05 05:24:47,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478699652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:47,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553342681] [2021-06-05 05:24:47,348 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 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 05:24:47,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:24:47,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:47,371 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:47,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:47,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:47,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:47,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:47,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:47,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:47,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:47,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:47,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:47,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:47,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:47,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553342681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:47,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:47,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:47,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878526505] [2021-06-05 05:24:47,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:47,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:47,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:47,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:47,859 INFO L87 Difference]: Start difference. First operand 1964 states and 3897 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:48,123 INFO L93 Difference]: Finished difference Result 3170 states and 6381 transitions. [2021-06-05 05:24:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:48,123 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:48,126 INFO L225 Difference]: With dead ends: 3170 [2021-06-05 05:24:48,126 INFO L226 Difference]: Without dead ends: 3105 [2021-06-05 05:24:48,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 588.6ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2021-06-05 05:24:48,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 1988. [2021-06-05 05:24:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 1.9838953195772522) internal successors, (3942), 1987 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:48,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3942 transitions. [2021-06-05 05:24:48,146 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3942 transitions. Word has length 36 [2021-06-05 05:24:48,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:48,146 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 3942 transitions. [2021-06-05 05:24:48,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:48,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3942 transitions. [2021-06-05 05:24:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:48,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:48,147 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:48,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:48,348 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1808154349, now seen corresponding path program 88 times [2021-06-05 05:24:48,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:48,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844257959] [2021-06-05 05:24:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:48,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:48,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844257959] [2021-06-05 05:24:48,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844257959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:48,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505388022] [2021-06-05 05:24:48,588 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 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 05:24:48,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:48,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:48,615 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:49,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:49,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:49,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:49,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:49,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:49,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:49,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:49,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505388022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:49,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:49,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:49,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528184396] [2021-06-05 05:24:49,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:49,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:49,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:49,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:49,105 INFO L87 Difference]: Start difference. First operand 1988 states and 3942 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:49,816 INFO L93 Difference]: Finished difference Result 3044 states and 6092 transitions. [2021-06-05 05:24:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:49,816 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:49,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:49,818 INFO L225 Difference]: With dead ends: 3044 [2021-06-05 05:24:49,818 INFO L226 Difference]: Without dead ends: 3002 [2021-06-05 05:24:49,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-06-05 05:24:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 1982. [2021-06-05 05:24:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-06-05 05:24:49,836 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-06-05 05:24:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:49,836 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-06-05 05:24:49,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-06-05 05:24:49,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:49,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:49,838 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:50,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:50,038 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:50,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:50,038 INFO L82 PathProgramCache]: Analyzing trace with hash 935181707, now seen corresponding path program 89 times [2021-06-05 05:24:50,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:50,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372910776] [2021-06-05 05:24:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:50,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:50,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372910776] [2021-06-05 05:24:50,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372910776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:50,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621988188] [2021-06-05 05:24:50,259 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 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 05:24:50,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:24:50,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:50,284 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:50,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:50,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:50,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:50,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:50,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:50,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:50,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:50,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:50,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:50,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:50,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621988188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:50,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:50,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:50,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264958243] [2021-06-05 05:24:50,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:50,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:50,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:50,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:50,760 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:51,305 INFO L93 Difference]: Finished difference Result 2927 states and 5852 transitions. [2021-06-05 05:24:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:51,305 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:51,307 INFO L225 Difference]: With dead ends: 2927 [2021-06-05 05:24:51,307 INFO L226 Difference]: Without dead ends: 2904 [2021-06-05 05:24:51,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:51,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-06-05 05:24:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1985. [2021-06-05 05:24:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 1.9838709677419355) internal successors, (3936), 1984 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 3936 transitions. [2021-06-05 05:24:51,324 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 3936 transitions. Word has length 36 [2021-06-05 05:24:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:51,324 INFO L482 AbstractCegarLoop]: Abstraction has 1985 states and 3936 transitions. [2021-06-05 05:24:51,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 3936 transitions. [2021-06-05 05:24:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:51,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:51,325 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:51,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 05:24:51,526 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:51,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:51,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1938121845, now seen corresponding path program 90 times [2021-06-05 05:24:51,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:51,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225217404] [2021-06-05 05:24:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:51,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:51,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225217404] [2021-06-05 05:24:51,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225217404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:51,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126148870] [2021-06-05 05:24:51,744 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 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 05:24:51,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:24:51,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:51,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:51,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:52,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:52,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:52,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:52,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:52,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:52,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:52,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:52,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:52,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:52,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:52,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126148870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:52,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:52,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:52,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156954926] [2021-06-05 05:24:52,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:52,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:52,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:52,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:52,286 INFO L87 Difference]: Start difference. First operand 1985 states and 3936 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:52,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:52,758 INFO L93 Difference]: Finished difference Result 2935 states and 5869 transitions. [2021-06-05 05:24:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:52,758 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:52,761 INFO L225 Difference]: With dead ends: 2935 [2021-06-05 05:24:52,761 INFO L226 Difference]: Without dead ends: 2911 [2021-06-05 05:24:52,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 597.3ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-06-05 05:24:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1982. [2021-06-05 05:24:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-06-05 05:24:52,783 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-06-05 05:24:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:52,783 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-06-05 05:24:52,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-06-05 05:24:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:52,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:52,785 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:53,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:53,001 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1884098707, now seen corresponding path program 91 times [2021-06-05 05:24:53,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:53,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132621844] [2021-06-05 05:24:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:53,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:53,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132621844] [2021-06-05 05:24:53,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132621844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:53,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337866684] [2021-06-05 05:24:53,187 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 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 05:24:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:53,210 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:53,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:53,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:53,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:53,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:53,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:53,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:53,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:53,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:53,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:53,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:53,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337866684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:53,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:53,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 05:24:53,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209620626] [2021-06-05 05:24:53,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:24:53,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:53,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:24:53,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:24:53,645 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:54,037 INFO L93 Difference]: Finished difference Result 3201 states and 6417 transitions. [2021-06-05 05:24:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:24:54,037 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:54,039 INFO L225 Difference]: With dead ends: 3201 [2021-06-05 05:24:54,039 INFO L226 Difference]: Without dead ends: 3012 [2021-06-05 05:24:54,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 600.3ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:54,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-06-05 05:24:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2015. [2021-06-05 05:24:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 1.9821251241310824) internal successors, (3992), 2014 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 3992 transitions. [2021-06-05 05:24:54,056 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 3992 transitions. Word has length 36 [2021-06-05 05:24:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:54,056 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 3992 transitions. [2021-06-05 05:24:54,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 3992 transitions. [2021-06-05 05:24:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:54,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:54,058 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:54,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 05:24:54,258 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:54,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1940533323, now seen corresponding path program 92 times [2021-06-05 05:24:54,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:54,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676965482] [2021-06-05 05:24:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:54,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:54,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676965482] [2021-06-05 05:24:54,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676965482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:54,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797532623] [2021-06-05 05:24:54,453 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 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 05:24:54,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:54,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:54,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:54,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:54,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:54,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:54,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:54,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:54,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:54,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:54,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:54,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:54,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:54,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797532623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:54,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:54,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 05:24:54,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562402735] [2021-06-05 05:24:54,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:24:54,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:54,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:24:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:24:54,917 INFO L87 Difference]: Start difference. First operand 2015 states and 3992 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:55,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:55,490 INFO L93 Difference]: Finished difference Result 3283 states and 6567 transitions. [2021-06-05 05:24:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:24:55,491 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:55,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:55,493 INFO L225 Difference]: With dead ends: 3283 [2021-06-05 05:24:55,493 INFO L226 Difference]: Without dead ends: 3078 [2021-06-05 05:24:55,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:24:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-05 05:24:55,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2009. [2021-06-05 05:24:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 1.9810756972111554) internal successors, (3978), 2008 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3978 transitions. [2021-06-05 05:24:55,510 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3978 transitions. Word has length 36 [2021-06-05 05:24:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:55,510 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 3978 transitions. [2021-06-05 05:24:55,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3978 transitions. [2021-06-05 05:24:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:55,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:55,511 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:55,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:55,712 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:55,712 INFO L82 PathProgramCache]: Analyzing trace with hash 518734893, now seen corresponding path program 93 times [2021-06-05 05:24:55,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:55,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763216302] [2021-06-05 05:24:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:55,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:55,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763216302] [2021-06-05 05:24:55,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763216302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:55,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571653417] [2021-06-05 05:24:55,910 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 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 05:24:55,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:24:55,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:55,933 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:55,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:56,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:56,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:56,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:56,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:56,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:56,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:56,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:56,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:56,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:56,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:56,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571653417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:56,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:56,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 05:24:56,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074549817] [2021-06-05 05:24:56,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:24:56,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:24:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:24:56,383 INFO L87 Difference]: Start difference. First operand 2009 states and 3978 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:56,918 INFO L93 Difference]: Finished difference Result 2891 states and 5824 transitions. [2021-06-05 05:24:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:24:56,919 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:56,921 INFO L225 Difference]: With dead ends: 2891 [2021-06-05 05:24:56,921 INFO L226 Difference]: Without dead ends: 2834 [2021-06-05 05:24:56,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-05 05:24:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2006. [2021-06-05 05:24:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 1.9810473815461347) internal successors, (3972), 2005 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3972 transitions. [2021-06-05 05:24:56,940 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3972 transitions. Word has length 36 [2021-06-05 05:24:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:56,940 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 3972 transitions. [2021-06-05 05:24:56,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3972 transitions. [2021-06-05 05:24:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:56,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:56,941 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:57,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:57,142 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:57,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1829487763, now seen corresponding path program 94 times [2021-06-05 05:24:57,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:57,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704124061] [2021-06-05 05:24:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:57,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:57,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704124061] [2021-06-05 05:24:57,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704124061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:57,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599289874] [2021-06-05 05:24:57,341 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 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 05:24:57,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:57,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:57,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:57,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:57,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:57,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:57,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:57,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:57,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:57,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:57,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:57,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:57,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:57,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:57,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599289874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:57,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:57,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 05:24:57,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004118179] [2021-06-05 05:24:57,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:24:57,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:57,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:24:57,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:24:57,839 INFO L87 Difference]: Start difference. First operand 2006 states and 3972 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:58,645 INFO L93 Difference]: Finished difference Result 3270 states and 6540 transitions. [2021-06-05 05:24:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:24:58,645 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:24:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:58,648 INFO L225 Difference]: With dead ends: 3270 [2021-06-05 05:24:58,648 INFO L226 Difference]: Without dead ends: 3074 [2021-06-05 05:24:58,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 763.4ms TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:24:58,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-06-05 05:24:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2030. [2021-06-05 05:24:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.9817644159684573) internal successors, (4021), 2029 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 4021 transitions. [2021-06-05 05:24:58,666 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 4021 transitions. Word has length 36 [2021-06-05 05:24:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:58,666 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 4021 transitions. [2021-06-05 05:24:58,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 4021 transitions. [2021-06-05 05:24:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:24:58,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:58,668 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:58,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 05:24:58,868 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:58,868 INFO L82 PathProgramCache]: Analyzing trace with hash 407689333, now seen corresponding path program 95 times [2021-06-05 05:24:58,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:58,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684835115] [2021-06-05 05:24:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:59,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:59,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684835115] [2021-06-05 05:24:59,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684835115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:59,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931094638] [2021-06-05 05:24:59,094 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 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 05:24:59,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:24:59,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:59,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:24:59,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:59,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:59,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:59,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:59,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:59,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:24:59,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:59,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:59,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:59,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:24:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:59,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931094638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:59,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:59,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:24:59,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476270994] [2021-06-05 05:24:59,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:24:59,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:59,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:24:59,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:59,596 INFO L87 Difference]: Start difference. First operand 2030 states and 4021 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:00,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:00,114 INFO L93 Difference]: Finished difference Result 3018 states and 6082 transitions. [2021-06-05 05:25:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:25:00,114 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:00,116 INFO L225 Difference]: With dead ends: 3018 [2021-06-05 05:25:00,116 INFO L226 Difference]: Without dead ends: 2956 [2021-06-05 05:25:00,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-06-05 05:25:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2051. [2021-06-05 05:25:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-06-05 05:25:00,135 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-06-05 05:25:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:00,135 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-06-05 05:25:00,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-06-05 05:25:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:00,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:00,136 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:00,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 05:25:00,337 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:00,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:00,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1143941907, now seen corresponding path program 96 times [2021-06-05 05:25:00,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:00,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981087328] [2021-06-05 05:25:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:00,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:00,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981087328] [2021-06-05 05:25:00,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981087328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:00,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395073733] [2021-06-05 05:25:00,563 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 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 05:25:00,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:25:00,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:00,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:25:00,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:01,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:01,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:01,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:01,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-06-05 05:25:01,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:01,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:01,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:01,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 05:25:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:01,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395073733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:01,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:01,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:25:01,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006530586] [2021-06-05 05:25:01,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:25:01,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:25:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:01,088 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:01,423 INFO L93 Difference]: Finished difference Result 2747 states and 5507 transitions. [2021-06-05 05:25:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:25:01,423 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:01,425 INFO L225 Difference]: With dead ends: 2747 [2021-06-05 05:25:01,425 INFO L226 Difference]: Without dead ends: 2724 [2021-06-05 05:25:01,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 582.5ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-05 05:25:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2051. [2021-06-05 05:25:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-06-05 05:25:01,442 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-06-05 05:25:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:01,443 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-06-05 05:25:01,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-06-05 05:25:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:01,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:01,444 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:01,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:01,661 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash 939265351, now seen corresponding path program 97 times [2021-06-05 05:25:01,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:01,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442147648] [2021-06-05 05:25:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:25:01,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:01,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442147648] [2021-06-05 05:25:01,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442147648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:01,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598356759] [2021-06-05 05:25:01,920 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 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 05:25:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:01,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:01,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:02,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:02,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:02,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:02,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:02,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:02,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:02,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:02,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598356759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:02,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:02,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 05:25:02,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304461638] [2021-06-05 05:25:02,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:25:02,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:25:02,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:25:02,410 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:02,770 INFO L93 Difference]: Finished difference Result 3042 states and 6095 transitions. [2021-06-05 05:25:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:25:02,770 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:02,773 INFO L225 Difference]: With dead ends: 3042 [2021-06-05 05:25:02,773 INFO L226 Difference]: Without dead ends: 2834 [2021-06-05 05:25:02,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-05 05:25:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2141. [2021-06-05 05:25:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 1.983177570093458) internal successors, (4244), 2140 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 4244 transitions. [2021-06-05 05:25:02,792 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 4244 transitions. Word has length 36 [2021-06-05 05:25:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:02,792 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 4244 transitions. [2021-06-05 05:25:02,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 4244 transitions. [2021-06-05 05:25:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:02,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:02,794 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:02,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 05:25:02,994 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:02,994 INFO L82 PathProgramCache]: Analyzing trace with hash -534706753, now seen corresponding path program 98 times [2021-06-05 05:25:02,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:02,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700403220] [2021-06-05 05:25:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:03,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:03,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700403220] [2021-06-05 05:25:03,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700403220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:03,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248289984] [2021-06-05 05:25:03,240 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 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 05:25:03,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:03,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:03,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:03,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:03,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:03,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:03,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:03,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:03,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:03,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:03,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:03,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:03,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248289984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:03,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:03,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 05:25:03,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262076625] [2021-06-05 05:25:03,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:25:03,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:03,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:25:03,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:03,797 INFO L87 Difference]: Start difference. First operand 2141 states and 4244 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:04,320 INFO L93 Difference]: Finished difference Result 3881 states and 7802 transitions. [2021-06-05 05:25:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:25:04,320 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:04,324 INFO L225 Difference]: With dead ends: 3881 [2021-06-05 05:25:04,324 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 05:25:04,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 640.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 05:25:04,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2072. [2021-06-05 05:25:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 1.981651376146789) internal successors, (4104), 2071 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 4104 transitions. [2021-06-05 05:25:04,345 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 4104 transitions. Word has length 36 [2021-06-05 05:25:04,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:04,345 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 4104 transitions. [2021-06-05 05:25:04,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 4104 transitions. [2021-06-05 05:25:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:04,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:04,346 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:04,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 05:25:04,548 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:04,548 INFO L82 PathProgramCache]: Analyzing trace with hash -501889653, now seen corresponding path program 99 times [2021-06-05 05:25:04,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:04,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135421246] [2021-06-05 05:25:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:04,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:04,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135421246] [2021-06-05 05:25:04,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135421246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:04,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19838673] [2021-06-05 05:25:04,804 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 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 05:25:04,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:25:04,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:04,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:04,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:05,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:05,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:05,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:05,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:05,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:05,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:05,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:05,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:05,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:05,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19838673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:05,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:05,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:25:05,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103088732] [2021-06-05 05:25:05,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:25:05,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:05,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:25:05,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:05,324 INFO L87 Difference]: Start difference. First operand 2072 states and 4104 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:05,743 INFO L93 Difference]: Finished difference Result 3168 states and 6373 transitions. [2021-06-05 05:25:05,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:25:05,750 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:05,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:05,753 INFO L225 Difference]: With dead ends: 3168 [2021-06-05 05:25:05,753 INFO L226 Difference]: Without dead ends: 3111 [2021-06-05 05:25:05,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 614.0ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-06-05 05:25:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2114. [2021-06-05 05:25:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-05 05:25:05,773 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-05 05:25:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:05,773 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-05 05:25:05,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-05 05:25:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:05,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:05,774 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:05,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 05:25:05,980 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2053520893, now seen corresponding path program 100 times [2021-06-05 05:25:05,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:05,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969576668] [2021-06-05 05:25:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:06,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:06,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969576668] [2021-06-05 05:25:06,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969576668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:06,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608052495] [2021-06-05 05:25:06,366 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 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 05:25:06,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:06,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:06,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:06,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:06,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:06,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:06,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:06,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:06,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:06,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:06,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:06,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:06,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608052495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:06,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:06,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:25:06,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698661875] [2021-06-05 05:25:06,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:25:06,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:06,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:25:06,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:06,907 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:07,236 INFO L93 Difference]: Finished difference Result 2764 states and 5529 transitions. [2021-06-05 05:25:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:25:07,236 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:07,239 INFO L225 Difference]: With dead ends: 2764 [2021-06-05 05:25:07,239 INFO L226 Difference]: Without dead ends: 2741 [2021-06-05 05:25:07,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 715.5ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-06-05 05:25:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2114. [2021-06-05 05:25:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:07,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-05 05:25:07,258 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-05 05:25:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:07,258 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-05 05:25:07,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-05 05:25:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:07,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:07,260 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:07,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:07,461 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1050580755, now seen corresponding path program 101 times [2021-06-05 05:25:07,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:07,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5663721] [2021-06-05 05:25:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:07,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:07,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5663721] [2021-06-05 05:25:07,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5663721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:07,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890213881] [2021-06-05 05:25:07,736 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 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 05:25:07,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:25:07,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:07,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:07,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:08,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:08,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:08,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:08,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:08,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:08,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:08,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:08,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:08,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:08,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:08,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890213881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:08,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:08,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:25:08,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770282854] [2021-06-05 05:25:08,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:25:08,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:08,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:25:08,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:08,281 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:08,892 INFO L93 Difference]: Finished difference Result 2775 states and 5552 transitions. [2021-06-05 05:25:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:25:08,893 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:08,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:08,895 INFO L225 Difference]: With dead ends: 2775 [2021-06-05 05:25:08,895 INFO L226 Difference]: Without dead ends: 2751 [2021-06-05 05:25:08,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 624.5ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:08,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-06-05 05:25:08,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2114. [2021-06-05 05:25:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-05 05:25:08,914 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-05 05:25:08,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:08,914 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-05 05:25:08,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-05 05:25:08,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:08,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:08,916 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:09,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 05:25:09,116 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:09,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1598664591, now seen corresponding path program 102 times [2021-06-05 05:25:09,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:09,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580750787] [2021-06-05 05:25:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:25:09,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:09,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580750787] [2021-06-05 05:25:09,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580750787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:09,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481676503] [2021-06-05 05:25:09,344 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 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 05:25:09,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:25:09,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:09,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:25:09,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:09,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:09,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:09,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:09,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:09,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:09,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:09,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:09,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:09,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:09,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481676503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:09,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:09,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 05:25:09,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477540707] [2021-06-05 05:25:09,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:25:09,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:09,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:25:09,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:25:09,909 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:10,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:10,260 INFO L93 Difference]: Finished difference Result 3031 states and 6075 transitions. [2021-06-05 05:25:10,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:25:10,260 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:10,262 INFO L225 Difference]: With dead ends: 3031 [2021-06-05 05:25:10,262 INFO L226 Difference]: Without dead ends: 2851 [2021-06-05 05:25:10,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 710.0ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-05 05:25:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2204. [2021-06-05 05:25:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9809350885156605) internal successors, (4364), 2203 states have internal predecessors, (4364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4364 transitions. [2021-06-05 05:25:10,281 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4364 transitions. Word has length 36 [2021-06-05 05:25:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:10,281 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4364 transitions. [2021-06-05 05:25:10,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4364 transitions. [2021-06-05 05:25:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:10,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:10,283 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:10,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 05:25:10,485 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash 124692487, now seen corresponding path program 103 times [2021-06-05 05:25:10,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:10,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488180085] [2021-06-05 05:25:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:10,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:10,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488180085] [2021-06-05 05:25:10,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488180085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:10,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387909735] [2021-06-05 05:25:10,711 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 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 05:25:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:10,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:10,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:11,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:11,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:11,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:11,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:11,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:11,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:11,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:11,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:11,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:11,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:11,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387909735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:11,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:11,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 05:25:11,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308102372] [2021-06-05 05:25:11,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:25:11,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:25:11,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:11,213 INFO L87 Difference]: Start difference. First operand 2204 states and 4364 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:11,626 INFO L93 Difference]: Finished difference Result 3432 states and 6914 transitions. [2021-06-05 05:25:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:25:11,626 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:11,629 INFO L225 Difference]: With dead ends: 3432 [2021-06-05 05:25:11,629 INFO L226 Difference]: Without dead ends: 3379 [2021-06-05 05:25:11,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 592.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3379 states. [2021-06-05 05:25:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3379 to 2192. [2021-06-05 05:25:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.9808306709265175) internal successors, (4340), 2191 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 4340 transitions. [2021-06-05 05:25:11,647 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 4340 transitions. Word has length 36 [2021-06-05 05:25:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:11,648 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 4340 transitions. [2021-06-05 05:25:11,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 4340 transitions. [2021-06-05 05:25:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:11,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:11,649 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:11,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:11,850 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1579308017, now seen corresponding path program 104 times [2021-06-05 05:25:11,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:11,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504994511] [2021-06-05 05:25:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:12,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:12,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504994511] [2021-06-05 05:25:12,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504994511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:12,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061468554] [2021-06-05 05:25:12,085 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 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 05:25:12,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:12,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:12,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:12,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:12,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:12,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:12,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:12,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:12,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:12,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:12,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:12,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:12,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:12,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:12,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061468554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:12,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:12,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 05:25:12,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612541836] [2021-06-05 05:25:12,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:25:12,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:12,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:25:12,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:12,625 INFO L87 Difference]: Start difference. First operand 2192 states and 4340 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:13,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:13,147 INFO L93 Difference]: Finished difference Result 3344 states and 6703 transitions. [2021-06-05 05:25:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:25:13,147 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:13,150 INFO L225 Difference]: With dead ends: 3344 [2021-06-05 05:25:13,150 INFO L226 Difference]: Without dead ends: 3283 [2021-06-05 05:25:13,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:13,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-06-05 05:25:13,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2207. [2021-06-05 05:25:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 1.9805077062556664) internal successors, (4369), 2206 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 4369 transitions. [2021-06-05 05:25:13,191 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 4369 transitions. Word has length 36 [2021-06-05 05:25:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:13,191 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 4369 transitions. [2021-06-05 05:25:13,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 4369 transitions. [2021-06-05 05:25:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:13,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:13,203 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:13,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:13,417 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:13,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:13,417 INFO L82 PathProgramCache]: Analyzing trace with hash 157509587, now seen corresponding path program 105 times [2021-06-05 05:25:13,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:13,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931568419] [2021-06-05 05:25:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:13,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:13,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931568419] [2021-06-05 05:25:13,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931568419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:13,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83753674] [2021-06-05 05:25:13,670 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 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 05:25:13,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:25:13,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:13,694 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:13,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:14,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:14,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:14,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:14,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:14,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:14,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:14,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:14,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:14,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:14,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:14,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83753674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:14,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:14,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:25:14,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207720620] [2021-06-05 05:25:14,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:25:14,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:14,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:25:14,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:14,210 INFO L87 Difference]: Start difference. First operand 2207 states and 4369 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:14,631 INFO L93 Difference]: Finished difference Result 3254 states and 6538 transitions. [2021-06-05 05:25:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:25:14,632 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:14,635 INFO L225 Difference]: With dead ends: 3254 [2021-06-05 05:25:14,635 INFO L226 Difference]: Without dead ends: 3197 [2021-06-05 05:25:14,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 651.4ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:14,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-06-05 05:25:14,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2195. [2021-06-05 05:25:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.980401093892434) internal successors, (4345), 2194 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 4345 transitions. [2021-06-05 05:25:14,656 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 4345 transitions. Word has length 36 [2021-06-05 05:25:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:14,656 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 4345 transitions. [2021-06-05 05:25:14,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:14,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 4345 transitions. [2021-06-05 05:25:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:14,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:14,672 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:14,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:14,887 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1394121653, now seen corresponding path program 106 times [2021-06-05 05:25:14,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:14,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792794783] [2021-06-05 05:25:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:15,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:15,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792794783] [2021-06-05 05:25:15,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792794783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:15,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178250966] [2021-06-05 05:25:15,125 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 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 05:25:15,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:15,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:15,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:15,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:15,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:15,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:15,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:15,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:15,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:15,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:15,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:15,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:15,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:15,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:15,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178250966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:15,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:15,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:25:15,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308376085] [2021-06-05 05:25:15,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:25:15,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:25:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:15,714 INFO L87 Difference]: Start difference. First operand 2195 states and 4345 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:16,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:16,299 INFO L93 Difference]: Finished difference Result 2867 states and 5731 transitions. [2021-06-05 05:25:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:25:16,299 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:16,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:16,302 INFO L225 Difference]: With dead ends: 2867 [2021-06-05 05:25:16,302 INFO L226 Difference]: Without dead ends: 2844 [2021-06-05 05:25:16,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 634.1ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2021-06-05 05:25:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2204. [2021-06-05 05:25:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-06-05 05:25:16,318 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-06-05 05:25:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:16,319 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-06-05 05:25:16,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-06-05 05:25:16,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:16,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:16,320 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:16,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:16,521 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash -391181515, now seen corresponding path program 107 times [2021-06-05 05:25:16,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:16,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531698624] [2021-06-05 05:25:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:16,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:16,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531698624] [2021-06-05 05:25:16,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531698624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:16,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161062458] [2021-06-05 05:25:16,752 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 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 05:25:16,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:25:16,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:16,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:16,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:17,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:17,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:17,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:17,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:17,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:17,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:17,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:17,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:17,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:17,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:17,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161062458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:17,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:17,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:25:17,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827319982] [2021-06-05 05:25:17,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:25:17,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:17,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:25:17,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:17,315 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:17,818 INFO L93 Difference]: Finished difference Result 2878 states and 5754 transitions. [2021-06-05 05:25:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:25:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:17,820 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 05:25:17,821 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 05:25:17,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 05:25:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2204. [2021-06-05 05:25:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-06-05 05:25:17,838 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-06-05 05:25:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:17,838 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-06-05 05:25:17,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-06-05 05:25:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:17,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:17,839 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:18,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 05:25:18,040 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1155151443, now seen corresponding path program 108 times [2021-06-05 05:25:18,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:18,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493800339] [2021-06-05 05:25:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:18,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:18,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493800339] [2021-06-05 05:25:18,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493800339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:18,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419088996] [2021-06-05 05:25:18,304 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 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 05:25:18,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:25:18,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:18,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:25:18,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:18,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:18,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:18,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:18,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:18,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:18,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:18,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:18,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:18,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:18,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:18,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419088996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:18,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:18,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:25:18,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140654479] [2021-06-05 05:25:18,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:25:18,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:18,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:25:18,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:18,933 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:19,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:19,403 INFO L93 Difference]: Finished difference Result 3075 states and 6179 transitions. [2021-06-05 05:25:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:25:19,404 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:19,406 INFO L225 Difference]: With dead ends: 3075 [2021-06-05 05:25:19,406 INFO L226 Difference]: Without dead ends: 2931 [2021-06-05 05:25:19,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 654.0ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:19,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2021-06-05 05:25:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2247. [2021-06-05 05:25:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.9821905609973285) internal successors, (4452), 2246 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 4452 transitions. [2021-06-05 05:25:19,424 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 4452 transitions. Word has length 36 [2021-06-05 05:25:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:19,424 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 4452 transitions. [2021-06-05 05:25:19,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 4452 transitions. [2021-06-05 05:25:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:19,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:19,426 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:19,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 05:25:19,627 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:19,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1735088919, now seen corresponding path program 109 times [2021-06-05 05:25:19,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:19,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260715466] [2021-06-05 05:25:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:25:19,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:19,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260715466] [2021-06-05 05:25:19,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260715466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:19,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391801075] [2021-06-05 05:25:19,848 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 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 05:25:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:19,871 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:19,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:20,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:20,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:20,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:20,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:20,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:20,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:20,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:20,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:20,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:20,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391801075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:20,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:20,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 05:25:20,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628701768] [2021-06-05 05:25:20,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:25:20,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:20,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:25:20,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:20,336 INFO L87 Difference]: Start difference. First operand 2247 states and 4452 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:20,737 INFO L93 Difference]: Finished difference Result 4634 states and 9317 transitions. [2021-06-05 05:25:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:25:20,737 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:20,741 INFO L225 Difference]: With dead ends: 4634 [2021-06-05 05:25:20,742 INFO L226 Difference]: Without dead ends: 4591 [2021-06-05 05:25:20,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 646.7ms TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:25:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-06-05 05:25:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 2286. [2021-06-05 05:25:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 1.9785557986870896) internal successors, (4521), 2285 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 4521 transitions. [2021-06-05 05:25:20,769 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 4521 transitions. Word has length 36 [2021-06-05 05:25:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:20,770 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 4521 transitions. [2021-06-05 05:25:20,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 4521 transitions. [2021-06-05 05:25:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:20,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:20,771 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:20,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 05:25:20,972 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:20,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1139316895, now seen corresponding path program 110 times [2021-06-05 05:25:20,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:20,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338467925] [2021-06-05 05:25:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:21,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:21,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338467925] [2021-06-05 05:25:21,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338467925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:21,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501461063] [2021-06-05 05:25:21,206 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 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 05:25:21,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:21,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:25:21,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:21,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:21,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:21,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:21,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:21,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-06-05 05:25:21,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:21,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:21,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:21,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 05:25:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:21,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501461063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:21,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:21,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:25:21,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665551771] [2021-06-05 05:25:21,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:25:21,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:21,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:25:21,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:21,704 INFO L87 Difference]: Start difference. First operand 2286 states and 4521 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:22,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:22,276 INFO L93 Difference]: Finished difference Result 4423 states and 8911 transitions. [2021-06-05 05:25:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:25:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:22,280 INFO L225 Difference]: With dead ends: 4423 [2021-06-05 05:25:22,280 INFO L226 Difference]: Without dead ends: 4375 [2021-06-05 05:25:22,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 719.3ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:25:22,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2021-06-05 05:25:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 2331. [2021-06-05 05:25:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 1.978969957081545) internal successors, (4611), 2330 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 4611 transitions. [2021-06-05 05:25:22,309 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 4611 transitions. Word has length 36 [2021-06-05 05:25:22,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:22,309 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 4611 transitions. [2021-06-05 05:25:22,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 4611 transitions. [2021-06-05 05:25:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:22,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:22,311 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:22,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:22,527 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:22,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1250362455, now seen corresponding path program 111 times [2021-06-05 05:25:22,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:22,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014511098] [2021-06-05 05:25:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:22,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:22,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014511098] [2021-06-05 05:25:22,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014511098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:22,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713539798] [2021-06-05 05:25:22,789 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 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 05:25:22,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:25:22,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:22,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:22,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:23,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:23,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:23,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:23,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:23,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:23,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:23,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:23,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:23,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:23,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713539798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:23,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:23,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:25:23,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562867074] [2021-06-05 05:25:23,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:25:23,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:23,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:25:23,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:23,301 INFO L87 Difference]: Start difference. First operand 2331 states and 4611 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:23,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:23,996 INFO L93 Difference]: Finished difference Result 4274 states and 8601 transitions. [2021-06-05 05:25:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:25:23,996 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:23,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:24,000 INFO L225 Difference]: With dead ends: 4274 [2021-06-05 05:25:24,000 INFO L226 Difference]: Without dead ends: 4231 [2021-06-05 05:25:24,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 735.4ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:25:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-05 05:25:24,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2382. [2021-06-05 05:25:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 1.9794204115917682) internal successors, (4713), 2381 states have internal predecessors, (4713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 4713 transitions. [2021-06-05 05:25:24,027 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 4713 transitions. Word has length 36 [2021-06-05 05:25:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:24,028 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 4713 transitions. [2021-06-05 05:25:24,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 4713 transitions. [2021-06-05 05:25:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:24,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:24,029 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:24,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 05:25:24,231 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:24,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:24,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1492973601, now seen corresponding path program 112 times [2021-06-05 05:25:24,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:24,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322292176] [2021-06-05 05:25:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:24,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:24,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322292176] [2021-06-05 05:25:24,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322292176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:24,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349836416] [2021-06-05 05:25:24,466 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 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 05:25:24,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:24,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:24,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:24,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:24,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:24,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:24,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:24,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:24,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:24,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:24,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:24,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:24,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349836416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:24,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:24,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:25:24,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260572095] [2021-06-05 05:25:24,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:25:24,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:24,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:25:24,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:24,971 INFO L87 Difference]: Start difference. First operand 2382 states and 4713 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:25,635 INFO L93 Difference]: Finished difference Result 4262 states and 8590 transitions. [2021-06-05 05:25:25,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:25:25,635 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:25,639 INFO L225 Difference]: With dead ends: 4262 [2021-06-05 05:25:25,639 INFO L226 Difference]: Without dead ends: 4200 [2021-06-05 05:25:25,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 756.1ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:25:25,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-06-05 05:25:25,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 2372. [2021-06-05 05:25:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 1.9801771404470687) internal successors, (4695), 2371 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 4695 transitions. [2021-06-05 05:25:25,666 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 4695 transitions. Word has length 36 [2021-06-05 05:25:25,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:25,666 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 4695 transitions. [2021-06-05 05:25:25,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 4695 transitions. [2021-06-05 05:25:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:25,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:25,667 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:25,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:25,868 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:25,868 INFO L82 PathProgramCache]: Analyzing trace with hash 140658571, now seen corresponding path program 113 times [2021-06-05 05:25:25,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:25,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131350434] [2021-06-05 05:25:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:26,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:26,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131350434] [2021-06-05 05:25:26,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131350434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:26,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371260519] [2021-06-05 05:25:26,131 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 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 05:25:26,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:25:26,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:26,156 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:25:26,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:26,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:26,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:26,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:26,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:26,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-05 05:25:26,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:26,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:26,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:26,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 05:25:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:26,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371260519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:26,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:26,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-06-05 05:25:26,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027604725] [2021-06-05 05:25:26,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:25:26,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:26,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:25:26,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:25:26,785 INFO L87 Difference]: Start difference. First operand 2372 states and 4695 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:28,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:28,288 INFO L93 Difference]: Finished difference Result 3919 states and 7823 transitions. [2021-06-05 05:25:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:25:28,288 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:28,291 INFO L225 Difference]: With dead ends: 3919 [2021-06-05 05:25:28,291 INFO L226 Difference]: Without dead ends: 3722 [2021-06-05 05:25:28,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1410.1ms TimeCoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:25:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2021-06-05 05:25:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 2432. [2021-06-05 05:25:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 1.9819004524886878) internal successors, (4818), 2431 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 4818 transitions. [2021-06-05 05:25:28,314 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 4818 transitions. Word has length 36 [2021-06-05 05:25:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:28,314 INFO L482 AbstractCegarLoop]: Abstraction has 2432 states and 4818 transitions. [2021-06-05 05:25:28,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 4818 transitions. [2021-06-05 05:25:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:28,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:28,316 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:28,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 05:25:28,517 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash -768920415, now seen corresponding path program 114 times [2021-06-05 05:25:28,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:28,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190977493] [2021-06-05 05:25:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:28,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:28,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190977493] [2021-06-05 05:25:28,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190977493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:28,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425334703] [2021-06-05 05:25:28,806 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 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 05:25:28,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:25:28,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:28,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:25:28,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:29,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:29,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:29,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:29,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:29,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:29,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:29,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:29,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425334703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:29,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:29,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 05:25:29,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857727652] [2021-06-05 05:25:29,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:25:29,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:25:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:29,305 INFO L87 Difference]: Start difference. First operand 2432 states and 4818 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:29,706 INFO L93 Difference]: Finished difference Result 3994 states and 7991 transitions. [2021-06-05 05:25:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:25:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:29,710 INFO L225 Difference]: With dead ends: 3994 [2021-06-05 05:25:29,710 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 05:25:29,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:29,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 05:25:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2486. [2021-06-05 05:25:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-06-05 05:25:29,733 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-06-05 05:25:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:29,733 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-06-05 05:25:29,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-06-05 05:25:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:29,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:29,734 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:29,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:29,935 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:29,935 INFO L82 PathProgramCache]: Analyzing trace with hash 234019723, now seen corresponding path program 115 times [2021-06-05 05:25:29,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:29,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518666628] [2021-06-05 05:25:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:30,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:30,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518666628] [2021-06-05 05:25:30,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518666628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:30,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826856107] [2021-06-05 05:25:30,175 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 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 05:25:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:30,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:30,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:30,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:30,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:30,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:30,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:30,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:30,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:30,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:30,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:30,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826856107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:30,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:30,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 05:25:30,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782321648] [2021-06-05 05:25:30,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:25:30,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:30,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:25:30,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:30,653 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:31,195 INFO L93 Difference]: Finished difference Result 3663 states and 7313 transitions. [2021-06-05 05:25:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:25:31,195 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:31,198 INFO L225 Difference]: With dead ends: 3663 [2021-06-05 05:25:31,198 INFO L226 Difference]: Without dead ends: 3639 [2021-06-05 05:25:31,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 589.4ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:31,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-06-05 05:25:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2486. [2021-06-05 05:25:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-06-05 05:25:31,219 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-06-05 05:25:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:31,220 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-06-05 05:25:31,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-06-05 05:25:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:31,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:31,221 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:31,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:31,422 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash 726123041, now seen corresponding path program 116 times [2021-06-05 05:25:31,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:31,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950386349] [2021-06-05 05:25:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:25:31,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:31,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950386349] [2021-06-05 05:25:31,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950386349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:31,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847950842] [2021-06-05 05:25:31,654 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 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 05:25:31,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:31,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:31,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:31,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:32,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:32,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:32,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:32,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:32,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:32,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:32,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:32,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:32,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847950842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:32,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:32,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 27 [2021-06-05 05:25:32,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738873332] [2021-06-05 05:25:32,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:25:32,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:32,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:25:32,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:25:32,082 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:32,475 INFO L93 Difference]: Finished difference Result 3578 states and 7155 transitions. [2021-06-05 05:25:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:25:32,476 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:32,479 INFO L225 Difference]: With dead ends: 3578 [2021-06-05 05:25:32,479 INFO L226 Difference]: Without dead ends: 3364 [2021-06-05 05:25:32,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 603.7ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-06-05 05:25:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 2624. [2021-06-05 05:25:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 1.9797941288600838) internal successors, (5193), 2623 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 5193 transitions. [2021-06-05 05:25:32,502 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 5193 transitions. Word has length 36 [2021-06-05 05:25:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:32,502 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 5193 transitions. [2021-06-05 05:25:32,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 5193 transitions. [2021-06-05 05:25:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:32,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:32,504 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:32,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 05:25:32,704 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash 144742215, now seen corresponding path program 117 times [2021-06-05 05:25:32,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:32,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828624996] [2021-06-05 05:25:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:25:32,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:32,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828624996] [2021-06-05 05:25:32,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828624996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:32,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970881822] [2021-06-05 05:25:32,894 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 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 05:25:32,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:25:32,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:32,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:32,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:33,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:33,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:33,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:33,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:33,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:33,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:33,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:33,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:33,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:33,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970881822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:33,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:33,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 26 [2021-06-05 05:25:33,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421145878] [2021-06-05 05:25:33,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:25:33,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:33,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:25:33,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:25:33,327 INFO L87 Difference]: Start difference. First operand 2624 states and 5193 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 05:25:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:33,770 INFO L93 Difference]: Finished difference Result 3703 states and 7416 transitions. [2021-06-05 05:25:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:25:33,770 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) Word has length 36 [2021-06-05 05:25:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:33,773 INFO L225 Difference]: With dead ends: 3703 [2021-06-05 05:25:33,773 INFO L226 Difference]: Without dead ends: 3490 [2021-06-05 05:25:33,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 592.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:33,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-05 05:25:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2501. [2021-06-05 05:25:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-06-05 05:25:33,794 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-06-05 05:25:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:33,794 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-06-05 05:25:33,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 05:25:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-06-05 05:25:33,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:33,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:33,796 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:33,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 05:25:33,996 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:33,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:33,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1446923267, now seen corresponding path program 118 times [2021-06-05 05:25:33,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:33,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868341961] [2021-06-05 05:25:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:34,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:34,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868341961] [2021-06-05 05:25:34,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868341961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:34,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762791556] [2021-06-05 05:25:34,226 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 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 05:25:34,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:34,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:34,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:34,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:34,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:34,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:34,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:34,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:34,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:34,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:34,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:34,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:34,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:34,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762791556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:34,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:34,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 05:25:34,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197575503] [2021-06-05 05:25:34,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:25:34,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:25:34,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:34,701 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:35,374 INFO L93 Difference]: Finished difference Result 3628 states and 7297 transitions. [2021-06-05 05:25:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:25:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:35,377 INFO L225 Difference]: With dead ends: 3628 [2021-06-05 05:25:35,377 INFO L226 Difference]: Without dead ends: 3563 [2021-06-05 05:25:35,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:35,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-06-05 05:25:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2501. [2021-06-05 05:25:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-06-05 05:25:35,400 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-06-05 05:25:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:35,400 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-06-05 05:25:35,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-06-05 05:25:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:35,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:35,402 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:35,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:35,603 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:35,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:35,603 INFO L82 PathProgramCache]: Analyzing trace with hash 537344281, now seen corresponding path program 119 times [2021-06-05 05:25:35,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:35,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153733513] [2021-06-05 05:25:35,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:35,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:35,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153733513] [2021-06-05 05:25:35,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153733513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:35,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121365443] [2021-06-05 05:25:35,850 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 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 05:25:35,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:25:35,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:35,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:25:35,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:36,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:36,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:36,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:36,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:36,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:36,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-05 05:25:36,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:36,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:36,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:36,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 05:25:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:36,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121365443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:36,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:36,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-06-05 05:25:36,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697587473] [2021-06-05 05:25:36,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:25:36,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:36,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:25:36,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:25:36,469 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:38,051 INFO L93 Difference]: Finished difference Result 3874 states and 7764 transitions. [2021-06-05 05:25:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:25:38,051 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:38,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:38,054 INFO L225 Difference]: With dead ends: 3874 [2021-06-05 05:25:38,054 INFO L226 Difference]: Without dead ends: 3713 [2021-06-05 05:25:38,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1549.9ms TimeCoverageRelationStatistics Valid=214, Invalid=2648, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:25:38,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-06-05 05:25:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 2540. [2021-06-05 05:25:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-06-05 05:25:38,076 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-06-05 05:25:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:38,076 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-06-05 05:25:38,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-06-05 05:25:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:38,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:38,078 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:38,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 05:25:38,278 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:38,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1540284419, now seen corresponding path program 120 times [2021-06-05 05:25:38,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:38,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969371871] [2021-06-05 05:25:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:38,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:38,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969371871] [2021-06-05 05:25:38,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969371871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:38,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8405838] [2021-06-05 05:25:38,512 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 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 05:25:38,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:25:38,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:38,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:38,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:38,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:38,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:38,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:38,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:38,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:38,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:38,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:38,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:38,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:38,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8405838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:38,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:38,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 05:25:38,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432520351] [2021-06-05 05:25:38,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:25:38,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:38,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:25:38,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:38,995 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:39,598 INFO L93 Difference]: Finished difference Result 3517 states and 7032 transitions. [2021-06-05 05:25:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:25:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:39,601 INFO L225 Difference]: With dead ends: 3517 [2021-06-05 05:25:39,601 INFO L226 Difference]: Without dead ends: 3493 [2021-06-05 05:25:39,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2021-06-05 05:25:39,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 2540. [2021-06-05 05:25:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-06-05 05:25:39,626 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-06-05 05:25:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:39,626 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-06-05 05:25:39,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-06-05 05:25:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:39,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:39,628 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:39,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:39,829 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:39,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:39,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1196743521, now seen corresponding path program 121 times [2021-06-05 05:25:39,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:39,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243159161] [2021-06-05 05:25:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:40,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:40,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243159161] [2021-06-05 05:25:40,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243159161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:40,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126020215] [2021-06-05 05:25:40,082 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 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 05:25:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:40,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:40,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:40,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:40,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:40,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:40,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:40,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:40,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:40,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:40,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:40,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126020215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:40,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:40,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 05:25:40,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115110818] [2021-06-05 05:25:40,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:25:40,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:40,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:25:40,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:40,587 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:40,968 INFO L93 Difference]: Finished difference Result 3604 states and 7227 transitions. [2021-06-05 05:25:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:25:40,969 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:40,971 INFO L225 Difference]: With dead ends: 3604 [2021-06-05 05:25:40,971 INFO L226 Difference]: Without dead ends: 3560 [2021-06-05 05:25:40,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 614.8ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-06-05 05:25:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2534. [2021-06-05 05:25:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-06-05 05:25:40,992 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-06-05 05:25:40,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:40,992 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-06-05 05:25:40,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-06-05 05:25:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:40,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:40,994 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:41,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 05:25:41,198 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:41,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:41,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2095283637, now seen corresponding path program 122 times [2021-06-05 05:25:41,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:41,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007383802] [2021-06-05 05:25:41,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:41,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:41,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007383802] [2021-06-05 05:25:41,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007383802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:41,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559860421] [2021-06-05 05:25:41,429 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 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 05:25:41,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:41,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:41,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:41,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:41,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:41,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:41,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:41,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:41,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:41,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:41,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:41,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559860421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:41,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:41,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 05:25:41,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839347430] [2021-06-05 05:25:41,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:25:41,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:25:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:41,920 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:42,570 INFO L93 Difference]: Finished difference Result 3514 states and 7026 transitions. [2021-06-05 05:25:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:25:42,571 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:42,573 INFO L225 Difference]: With dead ends: 3514 [2021-06-05 05:25:42,573 INFO L226 Difference]: Without dead ends: 3490 [2021-06-05 05:25:42,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-05 05:25:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2531. [2021-06-05 05:25:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 1.9837944664031621) internal successors, (5019), 2530 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 5019 transitions. [2021-06-05 05:25:42,595 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 5019 transitions. Word has length 36 [2021-06-05 05:25:42,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:42,596 INFO L482 AbstractCegarLoop]: Abstraction has 2531 states and 5019 transitions. [2021-06-05 05:25:42,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:42,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 5019 transitions. [2021-06-05 05:25:42,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:42,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:42,597 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:42,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:42,799 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:42,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1435713731, now seen corresponding path program 123 times [2021-06-05 05:25:42,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:42,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423271368] [2021-06-05 05:25:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:43,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:43,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423271368] [2021-06-05 05:25:43,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423271368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:43,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734673315] [2021-06-05 05:25:43,044 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 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 05:25:43,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:25:43,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:43,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:43,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:43,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:43,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:43,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:43,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:43,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:43,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:43,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:43,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:43,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:43,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734673315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:43,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:43,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 05:25:43,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644675791] [2021-06-05 05:25:43,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:25:43,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:43,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:25:43,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:43,566 INFO L87 Difference]: Start difference. First operand 2531 states and 5019 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:44,261 INFO L93 Difference]: Finished difference Result 3529 states and 7060 transitions. [2021-06-05 05:25:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:25:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:44,264 INFO L225 Difference]: With dead ends: 3529 [2021-06-05 05:25:44,265 INFO L226 Difference]: Without dead ends: 3504 [2021-06-05 05:25:44,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 607.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2021-06-05 05:25:44,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 2534. [2021-06-05 05:25:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-06-05 05:25:44,289 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-06-05 05:25:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:44,289 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-06-05 05:25:44,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-06-05 05:25:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:44,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:44,291 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:44,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 05:25:44,492 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:44,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1768497397, now seen corresponding path program 124 times [2021-06-05 05:25:44,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:44,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151720429] [2021-06-05 05:25:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:25:44,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:44,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151720429] [2021-06-05 05:25:44,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151720429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:44,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103016045] [2021-06-05 05:25:44,716 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 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 05:25:44,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:44,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:44,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:44,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:45,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:45,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:45,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:45,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:45,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:45,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:45,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:45,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:45,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103016045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:45,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:45,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 05:25:45,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570266382] [2021-06-05 05:25:45,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:25:45,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:45,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:25:45,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:25:45,164 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:45,539 INFO L93 Difference]: Finished difference Result 3439 states and 6862 transitions. [2021-06-05 05:25:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:25:45,540 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:45,543 INFO L225 Difference]: With dead ends: 3439 [2021-06-05 05:25:45,543 INFO L226 Difference]: Without dead ends: 3280 [2021-06-05 05:25:45,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-05 05:25:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2606. [2021-06-05 05:25:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 1.982341650671785) internal successors, (5164), 2605 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 5164 transitions. [2021-06-05 05:25:45,568 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 5164 transitions. Word has length 36 [2021-06-05 05:25:45,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:45,568 INFO L482 AbstractCegarLoop]: Abstraction has 2606 states and 5164 transitions. [2021-06-05 05:25:45,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 5164 transitions. [2021-06-05 05:25:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:45,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:45,570 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:45,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 05:25:45,785 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:45,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1516299603, now seen corresponding path program 125 times [2021-06-05 05:25:45,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:45,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059565781] [2021-06-05 05:25:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:25:46,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:46,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059565781] [2021-06-05 05:25:46,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059565781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:46,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862147444] [2021-06-05 05:25:46,033 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 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 05:25:46,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:25:46,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:46,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:25:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:46,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:46,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:46,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:46,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:46,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:46,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:46,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:46,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:46,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:46,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:46,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:46,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:46,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:46,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:46,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:46,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:46,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:46,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862147444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:46,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:46,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 05:25:46,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145253862] [2021-06-05 05:25:46,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:25:46,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:46,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:25:46,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:25:46,496 INFO L87 Difference]: Start difference. First operand 2606 states and 5164 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:47,038 INFO L93 Difference]: Finished difference Result 3655 states and 7282 transitions. [2021-06-05 05:25:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:25:47,039 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:47,042 INFO L225 Difference]: With dead ends: 3655 [2021-06-05 05:25:47,042 INFO L226 Difference]: Without dead ends: 3429 [2021-06-05 05:25:47,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 715.5ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-06-05 05:25:47,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2750. [2021-06-05 05:25:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 1.9774463441251364) internal successors, (5436), 2749 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 5436 transitions. [2021-06-05 05:25:47,064 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 5436 transitions. Word has length 36 [2021-06-05 05:25:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:47,064 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 5436 transitions. [2021-06-05 05:25:47,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:47,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 5436 transitions. [2021-06-05 05:25:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:47,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:47,066 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:47,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:47,266 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:47,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:47,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1945089073, now seen corresponding path program 126 times [2021-06-05 05:25:47,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:47,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630675641] [2021-06-05 05:25:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:25:47,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:47,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630675641] [2021-06-05 05:25:47,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630675641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:47,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904053429] [2021-06-05 05:25:47,505 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 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 05:25:47,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:25:47,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:47,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:47,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:47,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:47,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:47,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:47,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:47,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:47,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:47,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:47,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:47,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904053429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:47,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:47,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 05:25:47,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169047588] [2021-06-05 05:25:47,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:25:47,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:47,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:25:47,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:25:47,972 INFO L87 Difference]: Start difference. First operand 2750 states and 5436 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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 05:25:48,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:48,553 INFO L93 Difference]: Finished difference Result 4517 states and 8999 transitions. [2021-06-05 05:25:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:25:48,553 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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) Word has length 36 [2021-06-05 05:25:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:48,557 INFO L225 Difference]: With dead ends: 4517 [2021-06-05 05:25:48,557 INFO L226 Difference]: Without dead ends: 4275 [2021-06-05 05:25:48,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 713.6ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:25:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-06-05 05:25:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3137. [2021-06-05 05:25:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 1.9716198979591837) internal successors, (6183), 3136 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 6183 transitions. [2021-06-05 05:25:48,589 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 6183 transitions. Word has length 36 [2021-06-05 05:25:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:48,590 INFO L482 AbstractCegarLoop]: Abstraction has 3137 states and 6183 transitions. [2021-06-05 05:25:48,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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 05:25:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 6183 transitions. [2021-06-05 05:25:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:48,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:48,592 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:48,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:48,792 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:48,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:48,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1047697171, now seen corresponding path program 127 times [2021-06-05 05:25:48,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:48,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850601095] [2021-06-05 05:25:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:49,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:49,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850601095] [2021-06-05 05:25:49,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850601095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:49,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802377639] [2021-06-05 05:25:49,057 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 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 05:25:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:49,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:49,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:49,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:49,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:49,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:49,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:49,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:49,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:49,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:49,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:49,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802377639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:49,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:49,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 05:25:49,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540012113] [2021-06-05 05:25:49,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:25:49,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:49,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:25:49,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:25:49,558 INFO L87 Difference]: Start difference. First operand 3137 states and 6183 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:50,118 INFO L93 Difference]: Finished difference Result 4057 states and 8128 transitions. [2021-06-05 05:25:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:25:50,118 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:50,121 INFO L225 Difference]: With dead ends: 4057 [2021-06-05 05:25:50,121 INFO L226 Difference]: Without dead ends: 3966 [2021-06-05 05:25:50,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 586.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-06-05 05:25:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 3158. [2021-06-05 05:25:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 1.9718086791257523) internal successors, (6225), 3157 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 6225 transitions. [2021-06-05 05:25:50,154 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 6225 transitions. Word has length 36 [2021-06-05 05:25:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:50,154 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 6225 transitions. [2021-06-05 05:25:50,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 6225 transitions. [2021-06-05 05:25:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:50,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:50,156 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:50,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:50,357 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:50,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1035510087, now seen corresponding path program 128 times [2021-06-05 05:25:50,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:50,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533785014] [2021-06-05 05:25:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:25:50,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:50,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533785014] [2021-06-05 05:25:50,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533785014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:50,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064473666] [2021-06-05 05:25:50,579 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 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 05:25:50,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:50,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:50,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:50,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:50,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:50,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:50,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:50,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:50,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:50,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:50,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:50,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:50,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:50,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:50,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:50,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:50,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:50,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:50,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:51,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:51,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:51,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:51,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064473666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:51,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:51,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 05:25:51,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855451813] [2021-06-05 05:25:51,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:25:51,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:51,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:25:51,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:25:51,012 INFO L87 Difference]: Start difference. First operand 3158 states and 6225 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:51,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:51,472 INFO L93 Difference]: Finished difference Result 4075 states and 8096 transitions. [2021-06-05 05:25:51,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:25:51,473 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:51,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:51,475 INFO L225 Difference]: With dead ends: 4075 [2021-06-05 05:25:51,475 INFO L226 Difference]: Without dead ends: 3853 [2021-06-05 05:25:51,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3853 states. [2021-06-05 05:25:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 3251. [2021-06-05 05:25:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 3250 states have (on average 1.9726153846153847) internal successors, (6411), 3250 states have internal predecessors, (6411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 6411 transitions. [2021-06-05 05:25:51,500 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 6411 transitions. Word has length 36 [2021-06-05 05:25:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:51,500 INFO L482 AbstractCegarLoop]: Abstraction has 3251 states and 6411 transitions. [2021-06-05 05:25:51,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 6411 transitions. [2021-06-05 05:25:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:51,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:51,502 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:51,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:51,703 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:51,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:51,703 INFO L82 PathProgramCache]: Analyzing trace with hash -438462017, now seen corresponding path program 129 times [2021-06-05 05:25:51,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:51,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828363368] [2021-06-05 05:25:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:51,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:51,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828363368] [2021-06-05 05:25:51,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828363368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:51,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574184109] [2021-06-05 05:25:51,932 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 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 05:25:51,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:25:51,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:51,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:51,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:52,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:52,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:52,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:52,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:52,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:52,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:52,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:52,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:52,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574184109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:52,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:52,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 05:25:52,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496288997] [2021-06-05 05:25:52,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:25:52,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:52,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:25:52,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:25:52,367 INFO L87 Difference]: Start difference. First operand 3251 states and 6411 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:52,781 INFO L93 Difference]: Finished difference Result 5265 states and 10504 transitions. [2021-06-05 05:25:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:25:52,781 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:52,786 INFO L225 Difference]: With dead ends: 5265 [2021-06-05 05:25:52,786 INFO L226 Difference]: Without dead ends: 5202 [2021-06-05 05:25:52,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5202 states. [2021-06-05 05:25:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5202 to 3164. [2021-06-05 05:25:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3163 states have (on average 1.971862156180841) internal successors, (6237), 3163 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 6237 transitions. [2021-06-05 05:25:52,821 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 6237 transitions. Word has length 36 [2021-06-05 05:25:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:52,822 INFO L482 AbstractCegarLoop]: Abstraction has 3164 states and 6237 transitions. [2021-06-05 05:25:52,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 6237 transitions. [2021-06-05 05:25:52,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:52,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:52,824 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:53,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 05:25:53,024 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:53,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:53,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1957276157, now seen corresponding path program 130 times [2021-06-05 05:25:53,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:53,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092760586] [2021-06-05 05:25:53,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:53,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:53,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092760586] [2021-06-05 05:25:53,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092760586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:53,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36130833] [2021-06-05 05:25:53,359 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 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 05:25:53,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:53,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:53,384 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:53,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:53,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:53,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:53,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:53,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:53,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:53,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:53,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36130833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:53,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:53,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 05:25:53,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497597344] [2021-06-05 05:25:53,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:25:53,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:53,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:25:53,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:25:53,865 INFO L87 Difference]: Start difference. First operand 3164 states and 6237 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:54,487 INFO L93 Difference]: Finished difference Result 4252 states and 8498 transitions. [2021-06-05 05:25:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:25:54,488 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:54,491 INFO L225 Difference]: With dead ends: 4252 [2021-06-05 05:25:54,491 INFO L226 Difference]: Without dead ends: 4193 [2021-06-05 05:25:54,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 655.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-06-05 05:25:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3191. [2021-06-05 05:25:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-06-05 05:25:54,522 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-06-05 05:25:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:54,522 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-06-05 05:25:54,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-06-05 05:25:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:54,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:54,524 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:54,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 05:25:54,740 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:54,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:54,741 INFO L82 PathProgramCache]: Analyzing trace with hash -954336019, now seen corresponding path program 131 times [2021-06-05 05:25:54,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:54,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040853211] [2021-06-05 05:25:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:55,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:55,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040853211] [2021-06-05 05:25:55,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040853211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:55,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659065268] [2021-06-05 05:25:55,083 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 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 05:25:55,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:25:55,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:55,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:55,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:55,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:55,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:55,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:55,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:55,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:55,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:55,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:55,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:55,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659065268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:55,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:55,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 05:25:55,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635000501] [2021-06-05 05:25:55,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:25:55,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:55,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:25:55,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:25:55,588 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:55,819 INFO L93 Difference]: Finished difference Result 3853 states and 7654 transitions. [2021-06-05 05:25:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:25:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:55,822 INFO L225 Difference]: With dead ends: 3853 [2021-06-05 05:25:55,822 INFO L226 Difference]: Without dead ends: 3829 [2021-06-05 05:25:55,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 665.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:25:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-06-05 05:25:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 3191. [2021-06-05 05:25:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-06-05 05:25:55,849 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-06-05 05:25:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:55,849 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-06-05 05:25:55,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-06-05 05:25:55,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:55,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:55,851 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:56,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 05:25:56,051 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:56,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1694909327, now seen corresponding path program 132 times [2021-06-05 05:25:56,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:56,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096275053] [2021-06-05 05:25:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:25:56,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:56,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096275053] [2021-06-05 05:25:56,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096275053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:56,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280588913] [2021-06-05 05:25:56,264 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 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 05:25:56,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:25:56,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:56,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:56,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:56,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:56,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:56,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:56,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:56,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:56,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:56,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:56,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:56,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280588913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:56,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:56,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 05:25:56,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029304956] [2021-06-05 05:25:56,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:25:56,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:56,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:25:56,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:25:56,684 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:57,094 INFO L93 Difference]: Finished difference Result 4117 states and 8186 transitions. [2021-06-05 05:25:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:25:57,095 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:57,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:57,098 INFO L225 Difference]: With dead ends: 4117 [2021-06-05 05:25:57,098 INFO L226 Difference]: Without dead ends: 3907 [2021-06-05 05:25:57,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 655.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:25:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-05 05:25:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3290. [2021-06-05 05:25:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 1.9723320158102766) internal successors, (6487), 3289 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 6487 transitions. [2021-06-05 05:25:57,124 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 6487 transitions. Word has length 36 [2021-06-05 05:25:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:57,124 INFO L482 AbstractCegarLoop]: Abstraction has 3290 states and 6487 transitions. [2021-06-05 05:25:57,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 6487 transitions. [2021-06-05 05:25:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:57,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:57,126 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:57,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:57,326 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:57,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:57,326 INFO L82 PathProgramCache]: Analyzing trace with hash 220937223, now seen corresponding path program 133 times [2021-06-05 05:25:57,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:57,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14895595] [2021-06-05 05:25:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:57,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:57,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14895595] [2021-06-05 05:25:57,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14895595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:57,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324308921] [2021-06-05 05:25:57,563 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 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 05:25:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:57,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:57,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:57,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:57,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:57,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:57,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:57,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:57,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:57,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:57,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:57,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:57,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:57,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:57,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:57,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:57,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:57,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:57,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:57,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:57,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324308921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:57,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:57,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 05:25:57,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800452976] [2021-06-05 05:25:57,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:25:57,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:57,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:25:57,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:25:57,992 INFO L87 Difference]: Start difference. First operand 3290 states and 6487 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:58,434 INFO L93 Difference]: Finished difference Result 4583 states and 9168 transitions. [2021-06-05 05:25:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:25:58,434 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:58,438 INFO L225 Difference]: With dead ends: 4583 [2021-06-05 05:25:58,438 INFO L226 Difference]: Without dead ends: 4530 [2021-06-05 05:25:58,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 554.1ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4530 states. [2021-06-05 05:25:58,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4530 to 3230. [2021-06-05 05:25:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 1.9733663672963766) internal successors, (6372), 3229 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 6372 transitions. [2021-06-05 05:25:58,467 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 6372 transitions. Word has length 36 [2021-06-05 05:25:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:58,467 INFO L482 AbstractCegarLoop]: Abstraction has 3230 states and 6372 transitions. [2021-06-05 05:25:58,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 6372 transitions. [2021-06-05 05:25:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:58,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:58,469 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:58,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 05:25:58,670 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:58,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1675552753, now seen corresponding path program 134 times [2021-06-05 05:25:58,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:58,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075742922] [2021-06-05 05:25:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:58,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:58,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075742922] [2021-06-05 05:25:58,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075742922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:58,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128924234] [2021-06-05 05:25:58,890 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 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 05:25:58,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:58,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:58,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:25:58,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:59,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:59,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:59,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:59,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:25:59,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:59,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:59,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:59,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:25:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:59,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128924234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:59,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:59,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 05:25:59,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787173854] [2021-06-05 05:25:59,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:25:59,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:59,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:25:59,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:25:59,325 INFO L87 Difference]: Start difference. First operand 3230 states and 6372 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:59,726 INFO L93 Difference]: Finished difference Result 4673 states and 9315 transitions. [2021-06-05 05:25:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:25:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:25:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:59,729 INFO L225 Difference]: With dead ends: 4673 [2021-06-05 05:25:59,729 INFO L226 Difference]: Without dead ends: 4610 [2021-06-05 05:25:59,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:25:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-06-05 05:25:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 3248. [2021-06-05 05:25:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 1.9728980597474592) internal successors, (6406), 3247 states have internal predecessors, (6406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 6406 transitions. [2021-06-05 05:25:59,758 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 6406 transitions. Word has length 36 [2021-06-05 05:25:59,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:59,758 INFO L482 AbstractCegarLoop]: Abstraction has 3248 states and 6406 transitions. [2021-06-05 05:25:59,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:59,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 6406 transitions. [2021-06-05 05:25:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:25:59,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:59,760 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:59,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:59,960 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:59,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1297876917, now seen corresponding path program 135 times [2021-06-05 05:25:59,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:59,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660631418] [2021-06-05 05:25:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:00,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:00,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660631418] [2021-06-05 05:26:00,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660631418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:00,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215329437] [2021-06-05 05:26:00,197 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 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 05:26:00,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:26:00,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:00,223 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:00,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:00,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:00,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:00,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:00,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:00,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:00,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:00,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:00,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:00,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215329437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:00,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:00,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 05:26:00,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378181194] [2021-06-05 05:26:00,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:26:00,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:00,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:26:00,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:26:00,639 INFO L87 Difference]: Start difference. First operand 3248 states and 6406 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:01,108 INFO L93 Difference]: Finished difference Result 4370 states and 8737 transitions. [2021-06-05 05:26:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:26:01,108 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:01,111 INFO L225 Difference]: With dead ends: 4370 [2021-06-05 05:26:01,112 INFO L226 Difference]: Without dead ends: 4311 [2021-06-05 05:26:01,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 555.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:26:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-05 05:26:01,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3263. [2021-06-05 05:26:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-05 05:26:01,140 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-05 05:26:01,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:01,140 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-05 05:26:01,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:01,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-05 05:26:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:01,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:01,142 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:01,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:01,342 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:01,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:01,342 INFO L82 PathProgramCache]: Analyzing trace with hash -294936779, now seen corresponding path program 136 times [2021-06-05 05:26:01,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:01,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975406018] [2021-06-05 05:26:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:01,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:01,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975406018] [2021-06-05 05:26:01,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975406018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:01,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434290314] [2021-06-05 05:26:01,574 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 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 05:26:01,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:26:01,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:01,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:01,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:01,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:01,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:01,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:01,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:01,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:01,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:01,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:01,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:01,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:01,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:02,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:02,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:02,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:02,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:02,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:02,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434290314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:02,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:02,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 05:26:02,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142031981] [2021-06-05 05:26:02,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:26:02,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:26:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:26:02,017 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:02,430 INFO L93 Difference]: Finished difference Result 3962 states and 7874 transitions. [2021-06-05 05:26:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:26:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:02,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:02,433 INFO L225 Difference]: With dead ends: 3962 [2021-06-05 05:26:02,433 INFO L226 Difference]: Without dead ends: 3938 [2021-06-05 05:26:02,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 550.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:26:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-06-05 05:26:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3263. [2021-06-05 05:26:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-05 05:26:02,462 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-05 05:26:02,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:02,462 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-05 05:26:02,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:02,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-05 05:26:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:02,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:02,464 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:02,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:02,664 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:02,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1058906707, now seen corresponding path program 137 times [2021-06-05 05:26:02,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:02,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010133074] [2021-06-05 05:26:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:02,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:02,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010133074] [2021-06-05 05:26:02,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010133074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:02,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129381698] [2021-06-05 05:26:02,895 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 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 05:26:02,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:26:02,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:02,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:26:02,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:03,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:03,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:03,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:03,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:03,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:03,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:03,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:03,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:03,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129381698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:03,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:03,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 05:26:03,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349272472] [2021-06-05 05:26:03,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:26:03,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:03,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:26:03,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:26:03,397 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:03,735 INFO L93 Difference]: Finished difference Result 3982 states and 7910 transitions. [2021-06-05 05:26:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:26:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:03,738 INFO L225 Difference]: With dead ends: 3982 [2021-06-05 05:26:03,738 INFO L226 Difference]: Without dead ends: 3948 [2021-06-05 05:26:03,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:26:03,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-05 05:26:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3263. [2021-06-05 05:26:03,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-05 05:26:03,765 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-05 05:26:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:03,766 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-05 05:26:03,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-05 05:26:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:03,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:03,767 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:03,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:03,968 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash -532135131, now seen corresponding path program 138 times [2021-06-05 05:26:03,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:03,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001382163] [2021-06-05 05:26:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:26:04,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:04,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001382163] [2021-06-05 05:26:04,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001382163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:04,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613229655] [2021-06-05 05:26:04,191 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 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 05:26:04,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:26:04,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:04,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:04,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:04,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:04,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:04,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:04,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:04,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:04,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613229655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:04,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:04,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 25 [2021-06-05 05:26:04,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730690197] [2021-06-05 05:26:04,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:26:04,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:26:04,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:26:04,633 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:05,081 INFO L93 Difference]: Finished difference Result 4128 states and 8203 transitions. [2021-06-05 05:26:05,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:26:05,082 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:05,085 INFO L225 Difference]: With dead ends: 4128 [2021-06-05 05:26:05,086 INFO L226 Difference]: Without dead ends: 3903 [2021-06-05 05:26:05,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 680.6ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:26:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2021-06-05 05:26:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 3338. [2021-06-05 05:26:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.9733293377284986) internal successors, (6585), 3337 states have internal predecessors, (6585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 6585 transitions. [2021-06-05 05:26:05,117 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 6585 transitions. Word has length 36 [2021-06-05 05:26:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:05,117 INFO L482 AbstractCegarLoop]: Abstraction has 3338 states and 6585 transitions. [2021-06-05 05:26:05,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 6585 transitions. [2021-06-05 05:26:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:05,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:05,119 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:05,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:05,319 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:05,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:05,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2006107235, now seen corresponding path program 139 times [2021-06-05 05:26:05,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:05,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896734280] [2021-06-05 05:26:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:05,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:05,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896734280] [2021-06-05 05:26:05,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896734280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:05,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027643379] [2021-06-05 05:26:05,560 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 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 05:26:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:05,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:06,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:06,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:06,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:06,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:06,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:06,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:06,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027643379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:06,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:06,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-06-05 05:26:06,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340142659] [2021-06-05 05:26:06,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:26:06,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:06,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:26:06,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:26:06,032 INFO L87 Difference]: Start difference. First operand 3338 states and 6585 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:06,393 INFO L93 Difference]: Finished difference Result 4598 states and 9201 transitions. [2021-06-05 05:26:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:26:06,393 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:06,397 INFO L225 Difference]: With dead ends: 4598 [2021-06-05 05:26:06,397 INFO L226 Difference]: Without dead ends: 4545 [2021-06-05 05:26:06,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 554.7ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:26:06,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2021-06-05 05:26:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 3326. [2021-06-05 05:26:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.973233082706767) internal successors, (6561), 3325 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 6561 transitions. [2021-06-05 05:26:06,429 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 6561 transitions. Word has length 36 [2021-06-05 05:26:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:06,429 INFO L482 AbstractCegarLoop]: Abstraction has 3326 states and 6561 transitions. [2021-06-05 05:26:06,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 6561 transitions. [2021-06-05 05:26:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:06,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:06,431 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:06,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 05:26:06,631 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:06,632 INFO L82 PathProgramCache]: Analyzing trace with hash -551491705, now seen corresponding path program 140 times [2021-06-05 05:26:06,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:06,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810337379] [2021-06-05 05:26:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:06,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:06,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810337379] [2021-06-05 05:26:06,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810337379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:06,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635858036] [2021-06-05 05:26:06,872 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 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 05:26:06,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:26:06,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:06,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:07,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:07,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:07,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:07,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:07,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:07,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:07,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:07,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635858036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:07,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:07,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-06-05 05:26:07,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341661002] [2021-06-05 05:26:07,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:26:07,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:07,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:26:07,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:26:07,314 INFO L87 Difference]: Start difference. First operand 3326 states and 6561 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:07,620 INFO L93 Difference]: Finished difference Result 4391 states and 8752 transitions. [2021-06-05 05:26:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:26:07,620 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:07,624 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 05:26:07,624 INFO L226 Difference]: Without dead ends: 4338 [2021-06-05 05:26:07,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:26:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-06-05 05:26:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3344. [2021-06-05 05:26:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 1.9736763386180078) internal successors, (6598), 3343 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 6598 transitions. [2021-06-05 05:26:07,658 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 6598 transitions. Word has length 36 [2021-06-05 05:26:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:07,658 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 6598 transitions. [2021-06-05 05:26:07,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 6598 transitions. [2021-06-05 05:26:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:07,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:07,660 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:07,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 05:26:07,861 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:07,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:07,861 INFO L82 PathProgramCache]: Analyzing trace with hash 300524031, now seen corresponding path program 141 times [2021-06-05 05:26:07,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:07,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271943734] [2021-06-05 05:26:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:08,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:08,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271943734] [2021-06-05 05:26:08,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271943734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:08,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196250456] [2021-06-05 05:26:08,087 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 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 05:26:08,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:26:08,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:08,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:26:08,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:08,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:08,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:08,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:08,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 37 [2021-06-05 05:26:08,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:08,630 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-06-05 05:26:08,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:08,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:10 [2021-06-05 05:26:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:08,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196250456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:08,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:08,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 05:26:08,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235841510] [2021-06-05 05:26:08,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:26:08,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:08,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:26:08,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:26:08,640 INFO L87 Difference]: Start difference. First operand 3344 states and 6598 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:09,629 INFO L93 Difference]: Finished difference Result 4634 states and 9234 transitions. [2021-06-05 05:26:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:26:09,629 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:09,633 INFO L225 Difference]: With dead ends: 4634 [2021-06-05 05:26:09,633 INFO L226 Difference]: Without dead ends: 4520 [2021-06-05 05:26:09,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1018.3ms TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:26:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2021-06-05 05:26:09,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3368. [2021-06-05 05:26:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 1.9747549747549749) internal successors, (6649), 3367 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 6649 transitions. [2021-06-05 05:26:09,664 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 6649 transitions. Word has length 36 [2021-06-05 05:26:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:09,664 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 6649 transitions. [2021-06-05 05:26:09,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 6649 transitions. [2021-06-05 05:26:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:09,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:09,666 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:09,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 05:26:09,867 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash 770045921, now seen corresponding path program 142 times [2021-06-05 05:26:09,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:09,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814612422] [2021-06-05 05:26:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:10,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:10,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814612422] [2021-06-05 05:26:10,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814612422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:10,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375198508] [2021-06-05 05:26:10,137 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 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 05:26:10,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:26:10,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:10,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:10,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:10,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:10,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:10,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:10,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:10,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:10,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:10,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375198508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:10,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:10,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-06-05 05:26:10,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907242049] [2021-06-05 05:26:10,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:26:10,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:10,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:26:10,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:26:10,589 INFO L87 Difference]: Start difference. First operand 3368 states and 6649 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:10,889 INFO L93 Difference]: Finished difference Result 4433 states and 8859 transitions. [2021-06-05 05:26:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:26:10,889 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:10,893 INFO L225 Difference]: With dead ends: 4433 [2021-06-05 05:26:10,893 INFO L226 Difference]: Without dead ends: 4374 [2021-06-05 05:26:10,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 555.3ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:26:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4374 states. [2021-06-05 05:26:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4374 to 3356. [2021-06-05 05:26:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-06-05 05:26:10,923 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-06-05 05:26:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:10,923 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-06-05 05:26:10,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-06-05 05:26:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:10,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:10,926 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:11,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 05:26:11,126 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:11,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1772986059, now seen corresponding path program 143 times [2021-06-05 05:26:11,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:11,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288210056] [2021-06-05 05:26:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:11,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:11,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288210056] [2021-06-05 05:26:11,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288210056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:11,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257978694] [2021-06-05 05:26:11,371 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 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 05:26:11,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:26:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:11,396 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:11,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:11,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:11,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:11,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:11,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:11,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:11,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:11,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257978694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:11,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:11,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-06-05 05:26:11,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114560783] [2021-06-05 05:26:11,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:26:11,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:11,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:26:11,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:26:11,801 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:12,152 INFO L93 Difference]: Finished difference Result 4113 states and 8183 transitions. [2021-06-05 05:26:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:26:12,153 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:12,156 INFO L225 Difference]: With dead ends: 4113 [2021-06-05 05:26:12,156 INFO L226 Difference]: Without dead ends: 4089 [2021-06-05 05:26:12,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 539.4ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:26:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-05 05:26:12,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3356. [2021-06-05 05:26:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-06-05 05:26:12,188 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-06-05 05:26:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:12,189 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-06-05 05:26:12,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-06-05 05:26:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:12,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:12,201 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:12,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:12,402 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:12,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1009016131, now seen corresponding path program 144 times [2021-06-05 05:26:12,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:12,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161716328] [2021-06-05 05:26:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:12,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:12,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161716328] [2021-06-05 05:26:12,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161716328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:12,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366796524] [2021-06-05 05:26:12,638 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 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 05:26:12,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:26:12,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:12,664 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:12,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:13,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:13,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:13,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:13,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:13,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:13,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:13,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:13,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:13,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:13,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:13,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:13,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:13,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:13,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 37 [2021-06-05 05:26:13,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:13,451 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-06-05 05:26:13,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:13,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-06-05 05:26:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:13,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366796524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:13,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:13,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 05:26:13,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740666376] [2021-06-05 05:26:13,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:26:13,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:13,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:26:13,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:26:13,463 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:16,546 INFO L93 Difference]: Finished difference Result 4097 states and 8147 transitions. [2021-06-05 05:26:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:26:16,546 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:16,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:16,550 INFO L225 Difference]: With dead ends: 4097 [2021-06-05 05:26:16,550 INFO L226 Difference]: Without dead ends: 4063 [2021-06-05 05:26:16,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1781.7ms TimeCoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:26:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-06-05 05:26:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3353. [2021-06-05 05:26:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 1.974343675417661) internal successors, (6618), 3352 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 6618 transitions. [2021-06-05 05:26:16,582 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 6618 transitions. Word has length 36 [2021-06-05 05:26:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:16,582 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 6618 transitions. [2021-06-05 05:26:16,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 6618 transitions. [2021-06-05 05:26:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:16,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:16,584 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:16,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 05:26:16,785 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1533152851, now seen corresponding path program 145 times [2021-06-05 05:26:16,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:16,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771355882] [2021-06-05 05:26:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:17,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:17,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771355882] [2021-06-05 05:26:17,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771355882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:17,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960584326] [2021-06-05 05:26:17,020 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 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 05:26:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:17,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:17,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:17,349 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 05:26:17,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:17,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:17,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:17,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:17,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:10 [2021-06-05 05:26:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:17,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960584326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:17,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:17,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-06-05 05:26:17,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589808918] [2021-06-05 05:26:17,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:26:17,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:26:17,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:26:17,378 INFO L87 Difference]: Start difference. First operand 3353 states and 6618 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:17,807 INFO L93 Difference]: Finished difference Result 3920 states and 7778 transitions. [2021-06-05 05:26:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:26:17,807 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:17,811 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 05:26:17,811 INFO L226 Difference]: Without dead ends: 3905 [2021-06-05 05:26:17,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 489.9ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:26:17,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2021-06-05 05:26:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3360. [2021-06-05 05:26:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 1.9746948496576362) internal successors, (6633), 3359 states have internal predecessors, (6633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 6633 transitions. [2021-06-05 05:26:17,838 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 6633 transitions. Word has length 36 [2021-06-05 05:26:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:17,838 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 6633 transitions. [2021-06-05 05:26:17,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 6633 transitions. [2021-06-05 05:26:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 05:26:17,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:17,840 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:18,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:18,041 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:18,041 INFO L82 PathProgramCache]: Analyzing trace with hash 297908302, now seen corresponding path program 146 times [2021-06-05 05:26:18,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:18,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512649087] [2021-06-05 05:26:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:18,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:18,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512649087] [2021-06-05 05:26:18,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512649087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:18,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832766800] [2021-06-05 05:26:18,079 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 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 05:26:18,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:26:18,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:18,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:26:18,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:18,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832766800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:18,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:18,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 05:26:18,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496764362] [2021-06-05 05:26:18,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:26:18,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:18,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:26:18,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:26:18,165 INFO L87 Difference]: Start difference. First operand 3360 states and 6633 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:18,193 INFO L93 Difference]: Finished difference Result 3841 states and 7613 transitions. [2021-06-05 05:26:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:26:18,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 05:26:18,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:18,196 INFO L225 Difference]: With dead ends: 3841 [2021-06-05 05:26:18,196 INFO L226 Difference]: Without dead ends: 3830 [2021-06-05 05:26:18,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:26:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-06-05 05:26:18,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3470. [2021-06-05 05:26:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 3469 states have (on average 1.9824156817526666) internal successors, (6877), 3469 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 6877 transitions. [2021-06-05 05:26:18,224 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 6877 transitions. Word has length 38 [2021-06-05 05:26:18,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:18,224 INFO L482 AbstractCegarLoop]: Abstraction has 3470 states and 6877 transitions. [2021-06-05 05:26:18,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 6877 transitions. [2021-06-05 05:26:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:26:18,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:18,226 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:18,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:18,427 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:18,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1224230535, now seen corresponding path program 147 times [2021-06-05 05:26:18,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:18,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687423] [2021-06-05 05:26:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:18,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:18,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687423] [2021-06-05 05:26:18,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:18,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715973160] [2021-06-05 05:26:18,658 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 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 05:26:18,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:26:18,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:18,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:18,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:19,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:19,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:19,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:19,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:19,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:19,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:19,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:19,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:19,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715973160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:19,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:19,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 05:26:19,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965072752] [2021-06-05 05:26:19,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:26:19,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:19,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:26:19,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:26:19,118 INFO L87 Difference]: Start difference. First operand 3470 states and 6877 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:19,740 INFO L93 Difference]: Finished difference Result 4514 states and 9036 transitions. [2021-06-05 05:26:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:26:19,740 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:26:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:19,744 INFO L225 Difference]: With dead ends: 4514 [2021-06-05 05:26:19,744 INFO L226 Difference]: Without dead ends: 4469 [2021-06-05 05:26:19,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 716.3ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:26:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-06-05 05:26:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3509. [2021-06-05 05:26:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-06-05 05:26:19,778 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-06-05 05:26:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:19,778 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-06-05 05:26:19,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-06-05 05:26:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:26:19,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:19,781 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:19,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:19,981 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:19,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:19,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2076785471, now seen corresponding path program 148 times [2021-06-05 05:26:19,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:19,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475700212] [2021-06-05 05:26:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:20,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:20,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475700212] [2021-06-05 05:26:20,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475700212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:20,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940331930] [2021-06-05 05:26:20,222 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 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 05:26:20,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:26:20,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:20,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:20,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:20,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:20,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:20,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:20,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:20,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:20,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:20,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:20,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940331930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:20,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:20,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 05:26:20,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123771963] [2021-06-05 05:26:20,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:26:20,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:20,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:26:20,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:26:20,658 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:21,145 INFO L93 Difference]: Finished difference Result 4780 states and 9544 transitions. [2021-06-05 05:26:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:26:21,145 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:26:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:21,149 INFO L225 Difference]: With dead ends: 4780 [2021-06-05 05:26:21,149 INFO L226 Difference]: Without dead ends: 4735 [2021-06-05 05:26:21,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 748.1ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:26:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-06-05 05:26:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 3509. [2021-06-05 05:26:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-06-05 05:26:21,190 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-06-05 05:26:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:21,190 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-06-05 05:26:21,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-06-05 05:26:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:26:21,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:21,193 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:21,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:21,394 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:21,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:21,394 INFO L82 PathProgramCache]: Analyzing trace with hash 101428265, now seen corresponding path program 149 times [2021-06-05 05:26:21,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:21,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116946062] [2021-06-05 05:26:21,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:21,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:21,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116946062] [2021-06-05 05:26:21,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116946062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:21,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514688159] [2021-06-05 05:26:21,605 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 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 05:26:21,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:26:21,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:21,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:21,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:22,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:22,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:22,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:22,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:22,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-05 05:26:22,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:22,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:22,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:22,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 05:26:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:22,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514688159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:22,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:22,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 05:26:22,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627673492] [2021-06-05 05:26:22,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:26:22,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:22,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:26:22,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:26:22,154 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:23,183 INFO L93 Difference]: Finished difference Result 4916 states and 9863 transitions. [2021-06-05 05:26:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:26:23,183 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:26:23,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:23,187 INFO L225 Difference]: With dead ends: 4916 [2021-06-05 05:26:23,187 INFO L226 Difference]: Without dead ends: 4871 [2021-06-05 05:26:23,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1069.0ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:26:23,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-06-05 05:26:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 3533. [2021-06-05 05:26:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 3532 states have (on average 1.9818799546998866) internal successors, (7000), 3532 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 7000 transitions. [2021-06-05 05:26:23,220 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 7000 transitions. Word has length 39 [2021-06-05 05:26:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:23,220 INFO L482 AbstractCegarLoop]: Abstraction has 3533 states and 7000 transitions. [2021-06-05 05:26:23,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 7000 transitions. [2021-06-05 05:26:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:26:23,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:23,223 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:23,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:23,423 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:23,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:23,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1574344523, now seen corresponding path program 150 times [2021-06-05 05:26:23,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:23,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525717326] [2021-06-05 05:26:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:23,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:23,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525717326] [2021-06-05 05:26:23,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525717326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:23,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147643402] [2021-06-05 05:26:23,635 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 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 05:26:23,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:26:23,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:23,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:23,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:24,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:24,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:24,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:24,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:24,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:24,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:24,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:24,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:24,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147643402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:24,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:24,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 05:26:24,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684635737] [2021-06-05 05:26:24,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:26:24,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:24,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:26:24,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:26:24,094 INFO L87 Difference]: Start difference. First operand 3533 states and 7000 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:24,930 INFO L93 Difference]: Finished difference Result 5103 states and 10179 transitions. [2021-06-05 05:26:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:26:24,930 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:26:24,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:24,935 INFO L225 Difference]: With dead ends: 5103 [2021-06-05 05:26:24,935 INFO L226 Difference]: Without dead ends: 4891 [2021-06-05 05:26:24,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:26:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-06-05 05:26:24,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3611. [2021-06-05 05:26:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 3610 states have (on average 1.9817174515235456) internal successors, (7154), 3610 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 7154 transitions. [2021-06-05 05:26:24,973 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 7154 transitions. Word has length 39 [2021-06-05 05:26:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:24,973 INFO L482 AbstractCegarLoop]: Abstraction has 3611 states and 7154 transitions. [2021-06-05 05:26:24,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:24,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 7154 transitions. [2021-06-05 05:26:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:26:24,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:24,976 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:25,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 05:26:25,192 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:25,192 INFO L82 PathProgramCache]: Analyzing trace with hash 935790731, now seen corresponding path program 151 times [2021-06-05 05:26:25,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:25,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667814366] [2021-06-05 05:26:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:25,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:25,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667814366] [2021-06-05 05:26:25,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667814366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:25,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202491072] [2021-06-05 05:26:25,448 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 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 05:26:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:25,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:25,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:25,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:25,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:25,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:25,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:25,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:25,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:25,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:25,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:25,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:25,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:25,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:25,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:25,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:25,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202491072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:25,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:25,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 05:26:25,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600669655] [2021-06-05 05:26:25,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:26:25,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:25,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:26:25,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:26:25,900 INFO L87 Difference]: Start difference. First operand 3611 states and 7154 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:26,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:26,794 INFO L93 Difference]: Finished difference Result 4917 states and 9849 transitions. [2021-06-05 05:26:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:26:26,794 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:26:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:26,798 INFO L225 Difference]: With dead ends: 4917 [2021-06-05 05:26:26,798 INFO L226 Difference]: Without dead ends: 4872 [2021-06-05 05:26:26,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 895.9ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:26:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-06-05 05:26:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3671. [2021-06-05 05:26:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 1.98283378746594) internal successors, (7277), 3670 states have internal predecessors, (7277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 7277 transitions. [2021-06-05 05:26:26,831 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 7277 transitions. Word has length 39 [2021-06-05 05:26:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:26,831 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 7277 transitions. [2021-06-05 05:26:26,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 7277 transitions. [2021-06-05 05:26:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:26:26,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:26,834 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:27,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:27,034 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:27,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:27,035 INFO L82 PathProgramCache]: Analyzing trace with hash 616889269, now seen corresponding path program 152 times [2021-06-05 05:26:27,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:27,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271517804] [2021-06-05 05:26:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:27,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:27,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271517804] [2021-06-05 05:26:27,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271517804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:27,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227866303] [2021-06-05 05:26:27,248 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 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 05:26:27,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:26:27,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:27,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:26:27,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:27,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:27,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:27,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:27,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:27,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:27,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:27,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:27,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:27,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:27,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:27,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:27,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-05 05:26:27,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:27,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:27,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:27,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 05:26:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:27,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227866303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:27,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:27,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 05:26:27,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29324125] [2021-06-05 05:26:27,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:26:27,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:26:27,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:26:27,694 INFO L87 Difference]: Start difference. First operand 3671 states and 7277 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:28,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:28,481 INFO L93 Difference]: Finished difference Result 5037 states and 10091 transitions. [2021-06-05 05:26:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:26:28,482 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:26:28,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:28,486 INFO L225 Difference]: With dead ends: 5037 [2021-06-05 05:26:28,486 INFO L226 Difference]: Without dead ends: 4992 [2021-06-05 05:26:28,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 788.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:26:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4992 states. [2021-06-05 05:26:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4992 to 3698. [2021-06-05 05:26:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 3697 states have (on average 1.9829591560724913) internal successors, (7331), 3697 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 7331 transitions. [2021-06-05 05:26:28,522 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 7331 transitions. Word has length 39 [2021-06-05 05:26:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:28,522 INFO L482 AbstractCegarLoop]: Abstraction has 3698 states and 7331 transitions. [2021-06-05 05:26:28,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:28,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 7331 transitions. [2021-06-05 05:26:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:28,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:28,525 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:28,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 05:26:28,725 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:28,725 INFO L82 PathProgramCache]: Analyzing trace with hash 490317244, now seen corresponding path program 153 times [2021-06-05 05:26:28,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:28,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194259260] [2021-06-05 05:26:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:26:28,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:28,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194259260] [2021-06-05 05:26:28,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194259260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:28,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311763300] [2021-06-05 05:26:28,990 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 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 05:26:29,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:26:29,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:29,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 05:26:29,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:30,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:30,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:30,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:30,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:30,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:30,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 44 [2021-06-05 05:26:30,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:30,077 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.9 percent of original size [2021-06-05 05:26:30,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:30,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:123, output treesize:12 [2021-06-05 05:26:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:30,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311763300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:30,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:30,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-06-05 05:26:30,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984518998] [2021-06-05 05:26:30,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:26:30,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:30,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:26:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:26:30,088 INFO L87 Difference]: Start difference. First operand 3698 states and 7331 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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 05:26:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:32,250 INFO L93 Difference]: Finished difference Result 6069 states and 12152 transitions. [2021-06-05 05:26:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:26:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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) Word has length 41 [2021-06-05 05:26:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:32,255 INFO L225 Difference]: With dead ends: 6069 [2021-06-05 05:26:32,255 INFO L226 Difference]: Without dead ends: 6002 [2021-06-05 05:26:32,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1196.5ms TimeCoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:26:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2021-06-05 05:26:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 3716. [2021-06-05 05:26:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-06-05 05:26:32,291 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-06-05 05:26:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:32,292 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-06-05 05:26:32,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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 05:26:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-06-05 05:26:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:32,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:32,294 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:32,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 05:26:32,495 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:32,495 INFO L82 PathProgramCache]: Analyzing trace with hash -543142796, now seen corresponding path program 154 times [2021-06-05 05:26:32,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:32,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864965377] [2021-06-05 05:26:32,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:32,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:32,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864965377] [2021-06-05 05:26:32,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864965377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:32,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604828582] [2021-06-05 05:26:32,785 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 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 05:26:32,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:26:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:32,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:26:32,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:33,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:33,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:33,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:33,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:33,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:33,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:33,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:26:33,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:33,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:33,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:33,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:26:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:33,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604828582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:33,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:33,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 05:26:33,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887251506] [2021-06-05 05:26:33,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:26:33,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:33,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:26:33,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:26:33,499 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:34,215 INFO L93 Difference]: Finished difference Result 6664 states and 13360 transitions. [2021-06-05 05:26:34,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:26:34,215 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:26:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:34,221 INFO L225 Difference]: With dead ends: 6664 [2021-06-05 05:26:34,221 INFO L226 Difference]: Without dead ends: 6597 [2021-06-05 05:26:34,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 909.0ms TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:26:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2021-06-05 05:26:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 3716. [2021-06-05 05:26:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-06-05 05:26:34,274 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-06-05 05:26:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:34,274 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-06-05 05:26:34,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-06-05 05:26:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:34,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:34,277 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:34,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 05:26:34,477 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:34,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1543593212, now seen corresponding path program 155 times [2021-06-05 05:26:34,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:34,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242767790] [2021-06-05 05:26:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:34,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:34,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242767790] [2021-06-05 05:26:34,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242767790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:34,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180740843] [2021-06-05 05:26:34,806 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 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 05:26:34,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:26:34,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:34,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:26:34,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:35,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:35,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:35,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:35,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:35,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:35,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:26:35,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:35,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:35,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:35,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:26:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:35,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180740843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:35,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:35,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 05:26:35,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299291250] [2021-06-05 05:26:35,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:26:35,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:35,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:26:35,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:26:35,497 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:36,257 INFO L93 Difference]: Finished difference Result 7025 states and 14072 transitions. [2021-06-05 05:26:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:26:36,257 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:26:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:36,263 INFO L225 Difference]: With dead ends: 7025 [2021-06-05 05:26:36,263 INFO L226 Difference]: Without dead ends: 6922 [2021-06-05 05:26:36,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 981.4ms TimeCoverageRelationStatistics Valid=173, Invalid=1807, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:26:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6922 states. [2021-06-05 05:26:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 3857. [2021-06-05 05:26:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 1.97899377593361) internal successors, (7631), 3856 states have internal predecessors, (7631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 7631 transitions. [2021-06-05 05:26:36,306 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 7631 transitions. Word has length 41 [2021-06-05 05:26:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:36,306 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 7631 transitions. [2021-06-05 05:26:36,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 7631 transitions. [2021-06-05 05:26:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:36,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:36,309 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:36,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:36,516 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:36,516 INFO L82 PathProgramCache]: Analyzing trace with hash -13013580, now seen corresponding path program 156 times [2021-06-05 05:26:36,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:36,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783206911] [2021-06-05 05:26:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:36,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:36,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783206911] [2021-06-05 05:26:36,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783206911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:36,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129175798] [2021-06-05 05:26:36,822 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 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 05:26:36,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:26:36,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:36,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:26:36,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:37,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:37,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:37,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:37,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:37,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:37,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:26:37,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:37,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:37,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:37,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:26:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:37,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129175798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:37,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:37,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 05:26:37,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225117723] [2021-06-05 05:26:37,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:26:37,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:37,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:26:37,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:26:37,554 INFO L87 Difference]: Start difference. First operand 3857 states and 7631 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:38,330 INFO L93 Difference]: Finished difference Result 5973 states and 11891 transitions. [2021-06-05 05:26:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:26:38,331 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:26:38,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:38,336 INFO L225 Difference]: With dead ends: 5973 [2021-06-05 05:26:38,336 INFO L226 Difference]: Without dead ends: 5944 [2021-06-05 05:26:38,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 991.5ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:26:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2021-06-05 05:26:38,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 3896. [2021-06-05 05:26:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3896 states, 3895 states have (on average 1.9802310654685493) internal successors, (7713), 3895 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 7713 transitions. [2021-06-05 05:26:38,379 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 7713 transitions. Word has length 41 [2021-06-05 05:26:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:38,379 INFO L482 AbstractCegarLoop]: Abstraction has 3896 states and 7713 transitions. [2021-06-05 05:26:38,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 7713 transitions. [2021-06-05 05:26:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:38,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:38,383 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:38,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 05:26:38,583 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:38,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:38,584 INFO L82 PathProgramCache]: Analyzing trace with hash -862044258, now seen corresponding path program 157 times [2021-06-05 05:26:38,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:38,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659820019] [2021-06-05 05:26:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:38,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:38,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659820019] [2021-06-05 05:26:38,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659820019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:38,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191262268] [2021-06-05 05:26:38,868 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 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 05:26:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:38,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:26:38,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:39,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:39,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:39,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:39,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:39,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:39,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:39,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:26:39,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:39,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:39,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:39,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:26:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:39,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191262268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:39,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:39,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 05:26:39,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467456580] [2021-06-05 05:26:39,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:26:39,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:39,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:26:39,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:26:39,556 INFO L87 Difference]: Start difference. First operand 3896 states and 7713 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:40,166 INFO L93 Difference]: Finished difference Result 6364 states and 12786 transitions. [2021-06-05 05:26:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:26:40,166 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:26:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:40,172 INFO L225 Difference]: With dead ends: 6364 [2021-06-05 05:26:40,173 INFO L226 Difference]: Without dead ends: 6297 [2021-06-05 05:26:40,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 944.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:26:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6297 states. [2021-06-05 05:26:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6297 to 3182. [2021-06-05 05:26:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 3181 states have (on average 1.994970135177617) internal successors, (6346), 3181 states have internal predecessors, (6346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:40,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 6346 transitions. [2021-06-05 05:26:40,215 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 6346 transitions. Word has length 41 [2021-06-05 05:26:40,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:40,215 INFO L482 AbstractCegarLoop]: Abstraction has 3182 states and 6346 transitions. [2021-06-05 05:26:40,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:40,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 6346 transitions. [2021-06-05 05:26:40,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:40,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:40,217 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:40,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:40,418 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:40,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:40,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1224691750, now seen corresponding path program 158 times [2021-06-05 05:26:40,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:40,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750837329] [2021-06-05 05:26:40,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:40,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:40,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750837329] [2021-06-05 05:26:40,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750837329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:40,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560340571] [2021-06-05 05:26:40,750 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 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 05:26:40,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:26:40,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:40,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:26:40,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:41,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:41,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:41,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:41,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:41,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:26:41,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:41,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:41,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:41,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:26:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:41,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560340571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:41,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:41,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 05:26:41,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129603744] [2021-06-05 05:26:41,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:26:41,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:41,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:26:41,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:26:41,460 INFO L87 Difference]: Start difference. First operand 3182 states and 6346 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:42,436 INFO L93 Difference]: Finished difference Result 5735 states and 11591 transitions. [2021-06-05 05:26:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:26:42,437 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:26:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:42,441 INFO L225 Difference]: With dead ends: 5735 [2021-06-05 05:26:42,441 INFO L226 Difference]: Without dead ends: 5632 [2021-06-05 05:26:42,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1000.9ms TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:26:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5632 states. [2021-06-05 05:26:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5632 to 2936. [2021-06-05 05:26:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 2.005792163543441) internal successors, (5887), 2935 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 5887 transitions. [2021-06-05 05:26:42,474 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 5887 transitions. Word has length 41 [2021-06-05 05:26:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:42,474 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 5887 transitions. [2021-06-05 05:26:42,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 5887 transitions. [2021-06-05 05:26:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:42,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:42,476 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:42,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:42,676 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:42,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:42,677 INFO L82 PathProgramCache]: Analyzing trace with hash -331915042, now seen corresponding path program 159 times [2021-06-05 05:26:42,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:42,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145242996] [2021-06-05 05:26:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:42,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:42,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145242996] [2021-06-05 05:26:42,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145242996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:42,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856792641] [2021-06-05 05:26:42,981 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 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 05:26:43,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:26:43,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:43,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 62 conjunts are in the unsatisfiable core [2021-06-05 05:26:43,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:43,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:43,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:43,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:43,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:43,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 44 [2021-06-05 05:26:43,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:43,864 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 05:26:43,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:43,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:126, output treesize:12 [2021-06-05 05:26:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:43,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856792641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:43,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:43,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 05:26:43,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199329470] [2021-06-05 05:26:43,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:26:43,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:43,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:26:43,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:26:43,873 INFO L87 Difference]: Start difference. First operand 2936 states and 5887 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:46,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:46,210 INFO L93 Difference]: Finished difference Result 5251 states and 10563 transitions. [2021-06-05 05:26:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:26:46,210 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:26:46,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:46,214 INFO L225 Difference]: With dead ends: 5251 [2021-06-05 05:26:46,214 INFO L226 Difference]: Without dead ends: 5054 [2021-06-05 05:26:46,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2097.5ms TimeCoverageRelationStatistics Valid=269, Invalid=3763, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:26:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2021-06-05 05:26:46,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 3113. [2021-06-05 05:26:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 1.9983933161953729) internal successors, (6219), 3112 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 6219 transitions. [2021-06-05 05:26:46,244 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 6219 transitions. Word has length 41 [2021-06-05 05:26:46,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:46,245 INFO L482 AbstractCegarLoop]: Abstraction has 3113 states and 6219 transitions. [2021-06-05 05:26:46,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 6219 transitions. [2021-06-05 05:26:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:46,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:46,247 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:46,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:46,447 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:46,447 INFO L82 PathProgramCache]: Analyzing trace with hash 199723986, now seen corresponding path program 160 times [2021-06-05 05:26:46,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:46,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804061133] [2021-06-05 05:26:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:46,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804061133] [2021-06-05 05:26:46,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804061133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018318326] [2021-06-05 05:26:46,738 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 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 05:26:46,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:26:46,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:46,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:26:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:47,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:47,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:47,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:47,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:47,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:47,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:47,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:26:47,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:47,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:47,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:47,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:26:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:47,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018318326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:47,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:47,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 05:26:47,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376179868] [2021-06-05 05:26:47,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:26:47,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:47,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:26:47,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:26:47,461 INFO L87 Difference]: Start difference. First operand 3113 states and 6219 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:48,184 INFO L93 Difference]: Finished difference Result 5901 states and 11893 transitions. [2021-06-05 05:26:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:26:48,185 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:26:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:48,190 INFO L225 Difference]: With dead ends: 5901 [2021-06-05 05:26:48,190 INFO L226 Difference]: Without dead ends: 5804 [2021-06-05 05:26:48,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 955.4ms TimeCoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:26:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-06-05 05:26:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 3365. [2021-06-05 05:26:48,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 3364 states have (on average 1.9913793103448276) internal successors, (6699), 3364 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 6699 transitions. [2021-06-05 05:26:48,227 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 6699 transitions. Word has length 41 [2021-06-05 05:26:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:48,228 INFO L482 AbstractCegarLoop]: Abstraction has 3365 states and 6699 transitions. [2021-06-05 05:26:48,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 6699 transitions. [2021-06-05 05:26:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:48,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:48,230 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:48,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:48,431 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:48,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:48,431 INFO L82 PathProgramCache]: Analyzing trace with hash -273135364, now seen corresponding path program 161 times [2021-06-05 05:26:48,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:48,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517598475] [2021-06-05 05:26:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:48,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:48,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517598475] [2021-06-05 05:26:48,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517598475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:48,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328310813] [2021-06-05 05:26:48,753 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 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 05:26:48,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:26:48,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:48,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:26:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:50,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:50,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:50,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:50,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:50,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:50,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:50,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:50,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 36 [2021-06-05 05:26:50,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:50,319 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 05:26:50,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:50,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:99, output treesize:9 [2021-06-05 05:26:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:50,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328310813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:50,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:50,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-06-05 05:26:50,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857282175] [2021-06-05 05:26:50,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:26:50,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:50,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:26:50,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:26:50,342 INFO L87 Difference]: Start difference. First operand 3365 states and 6699 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 05:26:56,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:56,914 INFO L93 Difference]: Finished difference Result 6066 states and 12161 transitions. [2021-06-05 05:26:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:26:56,915 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) Word has length 41 [2021-06-05 05:26:56,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:56,919 INFO L225 Difference]: With dead ends: 6066 [2021-06-05 05:26:56,919 INFO L226 Difference]: Without dead ends: 5834 [2021-06-05 05:26:56,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 4044.3ms TimeCoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:26:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-06-05 05:26:56,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 3467. [2021-06-05 05:26:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-06-05 05:26:56,954 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-06-05 05:26:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:56,954 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-06-05 05:26:56,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 05:26:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-06-05 05:26:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:56,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:56,957 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:57,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 05:26:57,157 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1829742156, now seen corresponding path program 162 times [2021-06-05 05:26:57,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:57,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492074370] [2021-06-05 05:26:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:57,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:57,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492074370] [2021-06-05 05:26:57,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492074370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:57,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158076846] [2021-06-05 05:26:57,468 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 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 05:26:57,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:26:57,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:57,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:26:57,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:58,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:58,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:58,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:58,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:58,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:26:58,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:26:58,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:26:58,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:26:58,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:26:58,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:26:58,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:26:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:58,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158076846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:58,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:58,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 05:26:58,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758211986] [2021-06-05 05:26:58,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:26:58,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:26:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:26:58,221 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:59,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:59,288 INFO L93 Difference]: Finished difference Result 5352 states and 10712 transitions. [2021-06-05 05:26:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:26:59,289 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:26:59,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:59,293 INFO L225 Difference]: With dead ends: 5352 [2021-06-05 05:26:59,293 INFO L226 Difference]: Without dead ends: 5323 [2021-06-05 05:26:59,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1027.1ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:26:59,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2021-06-05 05:26:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 3467. [2021-06-05 05:26:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-06-05 05:26:59,329 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-06-05 05:26:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:59,329 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-06-05 05:26:59,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-06-05 05:26:59,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:59,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:59,332 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:59,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 05:26:59,533 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash -981044130, now seen corresponding path program 163 times [2021-06-05 05:26:59,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:59,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079136057] [2021-06-05 05:26:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:59,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:59,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079136057] [2021-06-05 05:26:59,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079136057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:59,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200655308] [2021-06-05 05:26:59,839 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 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 05:26:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:59,863 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:26:59,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:00,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:00,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:00,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:00,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:00,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:27:00,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:27:00,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:27:00,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:27:00,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:27:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:00,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200655308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:00,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:00,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 05:27:00,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244007683] [2021-06-05 05:27:00,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:27:00,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:00,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:27:00,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:27:00,584 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:01,431 INFO L93 Difference]: Finished difference Result 5320 states and 10648 transitions. [2021-06-05 05:27:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:27:01,432 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:27:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:01,436 INFO L225 Difference]: With dead ends: 5320 [2021-06-05 05:27:01,436 INFO L226 Difference]: Without dead ends: 5289 [2021-06-05 05:27:01,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1003.8ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:27:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2021-06-05 05:27:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 3506. [2021-06-05 05:27:01,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.9905848787446505) internal successors, (6977), 3505 states have internal predecessors, (6977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 6977 transitions. [2021-06-05 05:27:01,466 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 6977 transitions. Word has length 41 [2021-06-05 05:27:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:01,466 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 6977 transitions. [2021-06-05 05:27:01,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 6977 transitions. [2021-06-05 05:27:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:27:01,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:01,469 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:27:01,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:01,670 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:01,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:01,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1879697322, now seen corresponding path program 164 times [2021-06-05 05:27:01,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:01,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557116527] [2021-06-05 05:27:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:01,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:01,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557116527] [2021-06-05 05:27:01,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557116527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:01,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709747246] [2021-06-05 05:27:01,974 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 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 05:27:02,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:27:02,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:02,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:27:02,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:02,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:02,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:02,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:02,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:02,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:02,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:02,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:27:02,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:27:02,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:27:02,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:27:02,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:27:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:02,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709747246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:02,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:02,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 05:27:02,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341946095] [2021-06-05 05:27:02,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:27:02,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:02,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:27:02,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:27:02,663 INFO L87 Difference]: Start difference. First operand 3506 states and 6977 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:03,560 INFO L93 Difference]: Finished difference Result 6035 states and 12259 transitions. [2021-06-05 05:27:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:27:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:27:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:03,565 INFO L225 Difference]: With dead ends: 6035 [2021-06-05 05:27:03,565 INFO L226 Difference]: Without dead ends: 5929 [2021-06-05 05:27:03,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 963.4ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:27:03,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5929 states. [2021-06-05 05:27:03,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5929 to 3122. [2021-06-05 05:27:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3121 states have (on average 1.993912207625761) internal successors, (6223), 3121 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 6223 transitions. [2021-06-05 05:27:03,599 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 6223 transitions. Word has length 41 [2021-06-05 05:27:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:03,599 INFO L482 AbstractCegarLoop]: Abstraction has 3122 states and 6223 transitions. [2021-06-05 05:27:03,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 6223 transitions. [2021-06-05 05:27:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:27:03,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:03,602 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:27:03,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 05:27:03,802 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:03,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:03,802 INFO L82 PathProgramCache]: Analyzing trace with hash 207038686, now seen corresponding path program 165 times [2021-06-05 05:27:03,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:03,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248817428] [2021-06-05 05:27:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:04,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:04,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248817428] [2021-06-05 05:27:04,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248817428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:04,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547323919] [2021-06-05 05:27:04,112 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 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 05:27:04,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:27:04,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:04,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:27:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:04,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:04,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:04,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:04,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:04,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:27:04,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:27:04,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:27:04,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:27:04,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:27:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:04,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547323919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:04,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:04,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 05:27:04,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344682306] [2021-06-05 05:27:04,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:27:04,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:04,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:27:04,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:27:04,848 INFO L87 Difference]: Start difference. First operand 3122 states and 6223 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:05,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:05,542 INFO L93 Difference]: Finished difference Result 5436 states and 11008 transitions. [2021-06-05 05:27:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:27:05,542 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:27:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:05,547 INFO L225 Difference]: With dead ends: 5436 [2021-06-05 05:27:05,547 INFO L226 Difference]: Without dead ends: 5333 [2021-06-05 05:27:05,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1053.7ms TimeCoverageRelationStatistics Valid=184, Invalid=1978, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:27:05,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5333 states. [2021-06-05 05:27:05,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5333 to 2879. [2021-06-05 05:27:05,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-06-05 05:27:05,577 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-06-05 05:27:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:05,577 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-06-05 05:27:05,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-06-05 05:27:05,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:27:05,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:05,579 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:27:05,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:05,780 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1349568106, now seen corresponding path program 166 times [2021-06-05 05:27:05,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:05,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051788343] [2021-06-05 05:27:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:06,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:06,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051788343] [2021-06-05 05:27:06,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051788343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:06,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176569845] [2021-06-05 05:27:06,095 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 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 05:27:06,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:27:06,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:06,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:27:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:06,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:06,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:06,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:06,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:27:06,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:27:06,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:27:06,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:27:06,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:27:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:06,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176569845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:06,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:06,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 05:27:06,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356974997] [2021-06-05 05:27:06,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:27:06,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:06,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:27:06,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:27:06,814 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:07,719 INFO L93 Difference]: Finished difference Result 4690 states and 9451 transitions. [2021-06-05 05:27:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:27:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:27:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:07,723 INFO L225 Difference]: With dead ends: 4690 [2021-06-05 05:27:07,723 INFO L226 Difference]: Without dead ends: 4661 [2021-06-05 05:27:07,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1053.7ms TimeCoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:27:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-05 05:27:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 2879. [2021-06-05 05:27:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-06-05 05:27:07,755 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-06-05 05:27:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:07,755 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-06-05 05:27:07,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-06-05 05:27:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:27:07,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:07,757 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:27:07,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 05:27:07,958 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:07,958 INFO L82 PathProgramCache]: Analyzing trace with hash 301499944, now seen corresponding path program 167 times [2021-06-05 05:27:07,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:07,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924800964] [2021-06-05 05:27:07,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:08,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:08,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924800964] [2021-06-05 05:27:08,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924800964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:08,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068026210] [2021-06-05 05:27:08,296 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 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 05:27:08,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:27:08,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:08,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:27:08,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:09,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:09,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:09,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 36 [2021-06-05 05:27:09,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:27:09,098 INFO L628 ElimStorePlain]: treesize reduction 5, result has 82.8 percent of original size [2021-06-05 05:27:09,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:27:09,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:98, output treesize:9 [2021-06-05 05:27:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:09,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068026210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:09,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:09,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2021-06-05 05:27:09,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538667925] [2021-06-05 05:27:09,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:27:09,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:09,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:27:09,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:27:09,120 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) 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 05:27:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:10,149 INFO L93 Difference]: Finished difference Result 5671 states and 11398 transitions. [2021-06-05 05:27:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:27:10,150 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) 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) Word has length 41 [2021-06-05 05:27:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:10,154 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 05:27:10,154 INFO L226 Difference]: Without dead ends: 5413 [2021-06-05 05:27:10,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1231.0ms TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:27:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-05 05:27:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 3262. [2021-06-05 05:27:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 1.9908003679852806) internal successors, (6492), 3261 states have internal predecessors, (6492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 6492 transitions. [2021-06-05 05:27:10,186 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 6492 transitions. Word has length 41 [2021-06-05 05:27:10,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:10,186 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 6492 transitions. [2021-06-05 05:27:10,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9230769230769231) 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 05:27:10,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 6492 transitions. [2021-06-05 05:27:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:27:10,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:10,188 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:27:10,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:10,389 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:10,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1290788428, now seen corresponding path program 168 times [2021-06-05 05:27:10,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:10,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090905337] [2021-06-05 05:27:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:10,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:10,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090905337] [2021-06-05 05:27:10,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090905337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:10,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371499846] [2021-06-05 05:27:10,704 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 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 05:27:10,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:27:10,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:10,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:27:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:11,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:11,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:11,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:11,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:11,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:11,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:11,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:27:11,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:27:11,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:27:11,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:27:11,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:27:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:11,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371499846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:11,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:11,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 05:27:11,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734262242] [2021-06-05 05:27:11,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:27:11,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:11,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:27:11,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:27:11,433 INFO L87 Difference]: Start difference. First operand 3262 states and 6492 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:12,017 INFO L93 Difference]: Finished difference Result 6007 states and 12122 transitions. [2021-06-05 05:27:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:27:12,018 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:27:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:12,022 INFO L225 Difference]: With dead ends: 6007 [2021-06-05 05:27:12,022 INFO L226 Difference]: Without dead ends: 5784 [2021-06-05 05:27:12,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1061.9ms TimeCoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:27:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5784 states. [2021-06-05 05:27:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5784 to 2866. [2021-06-05 05:27:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 1.9720767888307156) internal successors, (5650), 2865 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 5650 transitions. [2021-06-05 05:27:12,053 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 5650 transitions. Word has length 41 [2021-06-05 05:27:12,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:12,053 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 5650 transitions. [2021-06-05 05:27:12,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 5650 transitions. [2021-06-05 05:27:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:27:12,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:12,055 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:27:12,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:12,255 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:12,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:12,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1447572076, now seen corresponding path program 169 times [2021-06-05 05:27:12,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:12,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331581043] [2021-06-05 05:27:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:12,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:12,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331581043] [2021-06-05 05:27:12,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331581043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:12,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070299551] [2021-06-05 05:27:12,574 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 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 05:27:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:12,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:27:12,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:13,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:13,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:13,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:13,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:13,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:13,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:13,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:27:13,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:27:13,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:27:13,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:27:13,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:27:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:13,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070299551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:13,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:13,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 05:27:13,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315023903] [2021-06-05 05:27:13,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:27:13,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:27:13,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:27:13,298 INFO L87 Difference]: Start difference. First operand 2866 states and 5650 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:14,061 INFO L93 Difference]: Finished difference Result 4555 states and 9072 transitions. [2021-06-05 05:27:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:27:14,061 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:27:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:14,064 INFO L225 Difference]: With dead ends: 4555 [2021-06-05 05:27:14,064 INFO L226 Difference]: Without dead ends: 4532 [2021-06-05 05:27:14,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1045.6ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:27:14,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2021-06-05 05:27:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 2872. [2021-06-05 05:27:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-06-05 05:27:14,090 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-06-05 05:27:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:14,090 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-06-05 05:27:14,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-06-05 05:27:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:27:14,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:14,092 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:27:14,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:14,292 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:14,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1998697194, now seen corresponding path program 170 times [2021-06-05 05:27:14,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:14,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802767127] [2021-06-05 05:27:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:14,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:14,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802767127] [2021-06-05 05:27:14,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802767127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:14,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838701168] [2021-06-05 05:27:14,613 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 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 05:27:14,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:27:14,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:14,637 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:27:14,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:15,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:15,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:15,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:15,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:15,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:27:15,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:27:15,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-05 05:27:15,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:27:15,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:27:15,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:27:15,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 05:27:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:15,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838701168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:15,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:15,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 05:27:15,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29681817] [2021-06-05 05:27:15,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:27:15,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:15,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:27:15,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:27:15,345 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:16,058 INFO L93 Difference]: Finished difference Result 4567 states and 9099 transitions. [2021-06-05 05:27:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:27:16,058 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:27:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:16,062 INFO L225 Difference]: With dead ends: 4567 [2021-06-05 05:27:16,062 INFO L226 Difference]: Without dead ends: 4543 [2021-06-05 05:27:16,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1032.4ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:27:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2021-06-05 05:27:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 2872. [2021-06-05 05:27:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-06-05 05:27:16,089 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-06-05 05:27:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:16,089 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-06-05 05:27:16,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-06-05 05:27:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:27:16,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:16,091 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:27:16,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:16,291 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:16,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1053452280, now seen corresponding path program 171 times [2021-06-05 05:27:16,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:16,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26083881] [2021-06-05 05:27:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:27:16,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:16,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26083881] [2021-06-05 05:27:16,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26083881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:16,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214355048] [2021-06-05 05:27:16,595 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 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 05:27:16,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:27:16,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:16,621 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 05:27:16,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:28:10,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:28:10,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:28:10,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:28:10,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:28:10,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:28:10,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:28:10,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 44 [2021-06-05 05:28:10,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:28:10,184 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 05:28:10,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:28:10,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:12 [2021-06-05 05:28:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:28:10,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214355048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:10,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:28:10,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-06-05 05:28:10,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041486462] [2021-06-05 05:28:10,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:28:10,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:28:10,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:28:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1075, Unknown=17, NotChecked=0, Total=1190 [2021-06-05 05:28:10,207 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:55,212 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-06-05 05:29:55,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:29:55,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:29:55,414 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:860) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:774) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-06-05 05:29:55,419 INFO L168 Benchmark]: Toolchain (without parser) took 406506.39 ms. Allocated memory was 379.6 MB in the beginning and 660.6 MB in the end (delta: 281.0 MB). Free memory was 358.6 MB in the beginning and 333.9 MB in the end (delta: 24.7 MB). Peak memory consumption was 306.7 MB. Max. memory is 16.0 GB. [2021-06-05 05:29:55,419 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 379.6 MB. Free memory is still 359.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:29:55,419 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.34 ms. Allocated memory is still 379.6 MB. Free memory was 358.6 MB in the beginning and 357.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:29:55,419 INFO L168 Benchmark]: Boogie Preprocessor took 14.05 ms. Allocated memory is still 379.6 MB. Free memory was 357.1 MB in the beginning and 356.1 MB in the end (delta: 947.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:29:55,419 INFO L168 Benchmark]: RCFGBuilder took 242.80 ms. Allocated memory is still 379.6 MB. Free memory was 356.1 MB in the beginning and 343.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 05:29:55,419 INFO L168 Benchmark]: TraceAbstraction took 406219.35 ms. Allocated memory was 379.6 MB in the beginning and 660.6 MB in the end (delta: 281.0 MB). Free memory was 343.5 MB in the beginning and 333.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 292.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:29:55,419 INFO L339 ainManager$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 379.6 MB. Free memory is still 359.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.34 ms. Allocated memory is still 379.6 MB. Free memory was 358.6 MB in the beginning and 357.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.05 ms. Allocated memory is still 379.6 MB. Free memory was 357.1 MB in the beginning and 356.1 MB in the end (delta: 947.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 242.80 ms. Allocated memory is still 379.6 MB. Free memory was 356.1 MB in the beginning and 343.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 406219.35 ms. Allocated memory was 379.6 MB in the beginning and 660.6 MB in the end (delta: 281.0 MB). Free memory was 343.5 MB in the beginning and 333.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 292.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...