/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/unroll-cond-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:07:56,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:07:56,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:07:56,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:07:56,187 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 04:07:56,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:07:56,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:07:56,234 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:07:56,235 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:07:56,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:07:56,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:07:56,238 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:07:56,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:07:56,238 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:07:56,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:07:56,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:07:56,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:07:56,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:07:56,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:07:56,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:07:56,240 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:07:56,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:07:56,240 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:07:56,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:07:56,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:07:56,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:07:56,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:07:56,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:07:56,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:07:56,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:07:56,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:07:56,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:07:56,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:07:56,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:07:56,242 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:07:56,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:07:56,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:07:56,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:07:56,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:07:56,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:07:56,599 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:07:56,600 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:07:56,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl [2021-06-05 04:07:56,601 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl' [2021-06-05 04:07:56,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:07:56,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:07:56,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:07:56,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:07:56,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:07:56,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:56" (1/1) ... [2021-06-05 04:07:56,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:56" (1/1) ... [2021-06-05 04:07:56,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:07:56,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:07:56,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:07:56,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:07:56,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:56" (1/1) ... [2021-06-05 04:07:56,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:56" (1/1) ... [2021-06-05 04:07:56,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:56" (1/1) ... [2021-06-05 04:07:56,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:56" (1/1) ... [2021-06-05 04:07:56,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:56" (1/1) ... [2021-06-05 04:07:56,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:56" (1/1) ... [2021-06-05 04:07:56,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:56" (1/1) ... [2021-06-05 04:07:56,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:07:56,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:07:56,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:07:56,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:07:56,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:56" (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 04:07:56,755 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:07:56,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:07:56,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:07:56,757 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:07:56,757 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:07:56,757 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:07:56,757 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:07:56,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:07:56,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:07:56,758 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 04:07:57,068 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:07:57,069 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 04:07:57,069 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 04:07:57,071 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:07:57 BoogieIcfgContainer [2021-06-05 04:07:57,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:07:57,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:07:57,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:07:57,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:07:57,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:56" (1/2) ... [2021-06-05 04:07:57,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9f5768 and model type unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:07:57, skipping insertion in model container [2021-06-05 04:07:57,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:07:57" (2/2) ... [2021-06-05 04:07:57,084 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.bpl [2021-06-05 04:07:57,088 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:07:57,088 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:07:57,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:07:57,089 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:07:57,116 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 04:07:57,133 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 04:07:57,148 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:07:57,148 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:07:57,148 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:07:57,148 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:07:57,148 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:07:57,148 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:07:57,148 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:07:57,149 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:07:57,156 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-06-05 04:07:57,164 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:07:57,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:57,171 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:57,171 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:57,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:57,176 INFO L82 PathProgramCache]: Analyzing trace with hash -163389209, now seen corresponding path program 1 times [2021-06-05 04:07:57,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:57,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665305016] [2021-06-05 04:07:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:57,333 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 04:07:57,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:57,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665305016] [2021-06-05 04:07:57,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665305016] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:07:57,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:07:57,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:07:57,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708407642] [2021-06-05 04:07:57,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:07:57,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:57,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:07:57,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:07:57,350 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:57,399 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-06-05 04:07:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:07:57,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:07:57,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:57,406 INFO L225 Difference]: With dead ends: 26 [2021-06-05 04:07:57,406 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 04:07:57,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:07:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 04:07:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 04:07:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:57,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-06-05 04:07:57,429 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-06-05 04:07:57,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:57,429 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-06-05 04:07:57,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-06-05 04:07:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:07:57,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:57,430 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:57,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:07:57,431 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:57,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:57,431 INFO L82 PathProgramCache]: Analyzing trace with hash 580194151, now seen corresponding path program 2 times [2021-06-05 04:07:57,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:57,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409890651] [2021-06-05 04:07:57,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:57,483 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 04:07:57,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:57,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409890651] [2021-06-05 04:07:57,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409890651] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:07:57,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:07:57,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:07:57,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638131365] [2021-06-05 04:07:57,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:07:57,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:57,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:07:57,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:07:57,487 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:57,514 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 04:07:57,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:07:57,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:07:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:57,515 INFO L225 Difference]: With dead ends: 28 [2021-06-05 04:07:57,516 INFO L226 Difference]: Without dead ends: 23 [2021-06-05 04:07:57,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:07:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-06-05 04:07:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-06-05 04:07:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 04:07:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 04:07:57,520 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 04:07:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:57,520 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 04:07:57,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 04:07:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:07:57,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:57,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:57,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 04:07:57,522 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash -824603045, now seen corresponding path program 1 times [2021-06-05 04:07:57,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:57,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134560108] [2021-06-05 04:07:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:57,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:57,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134560108] [2021-06-05 04:07:57,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134560108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:57,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872599961] [2021-06-05 04:07:57,681 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 04:07:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:57,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:57,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:57,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:07:57,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:07:57,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:07:57,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:07:57,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 04:07:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:57,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872599961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:57,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:57,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 04:07:57,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720265352] [2021-06-05 04:07:57,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:07:57,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:57,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:07:57,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:07:57,998 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:07:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:58,059 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-06-05 04:07:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:07:58,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 11 [2021-06-05 04:07:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:58,061 INFO L225 Difference]: With dead ends: 30 [2021-06-05 04:07:58,061 INFO L226 Difference]: Without dead ends: 22 [2021-06-05 04:07:58,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:07:58,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-06-05 04:07:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-06-05 04:07:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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 04:07:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 04:07:58,064 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 04:07:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:58,065 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 04:07:58,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:07:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 04:07:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:07:58,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:58,065 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:58,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 04:07:58,288 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:58,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash -81019685, now seen corresponding path program 2 times [2021-06-05 04:07:58,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:58,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28064695] [2021-06-05 04:07:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:58,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:58,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28064695] [2021-06-05 04:07:58,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28064695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:58,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959445840] [2021-06-05 04:07:58,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:07:58,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:07:58,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:58,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:58,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:58,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 04:07:58,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:07:58,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:07:58,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 04:07:58,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:07:58,544 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-06-05 04:07:58,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:07:58,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 04:07:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:58,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959445840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:58,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:58,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 04:07:58,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577373613] [2021-06-05 04:07:58,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:07:58,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:58,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:07:58,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:07:58,608 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:07:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:58,682 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-06-05 04:07:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:07:58,683 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 11 [2021-06-05 04:07:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:58,685 INFO L225 Difference]: With dead ends: 35 [2021-06-05 04:07:58,685 INFO L226 Difference]: Without dead ends: 30 [2021-06-05 04:07:58,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:07:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-05 04:07:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-06-05 04:07:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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 04:07:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 04:07:58,693 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 04:07:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:58,693 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 04:07:58,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:07:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 04:07:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:07:58,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:58,694 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:58,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:58,909 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:58,909 INFO L82 PathProgramCache]: Analyzing trace with hash 770124447, now seen corresponding path program 3 times [2021-06-05 04:07:58,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:58,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352786685] [2021-06-05 04:07:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:58,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:58,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352786685] [2021-06-05 04:07:58,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352786685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:58,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835771355] [2021-06-05 04:07:58,979 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 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 04:07:59,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:07:59,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:59,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:59,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:59,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:07:59,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:07:59,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:07:59,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 04:07:59,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:07:59,167 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-06-05 04:07:59,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:07:59,168 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 04:07:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:59,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835771355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:59,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:59,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 04:07:59,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589817695] [2021-06-05 04:07:59,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:07:59,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:59,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:07:59,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:07:59,219 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:07:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:59,366 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-06-05 04:07:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:07:59,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 11 [2021-06-05 04:07:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:59,370 INFO L225 Difference]: With dead ends: 51 [2021-06-05 04:07:59,370 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 04:07:59,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:07:59,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 04:07:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-06-05 04:07:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 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 04:07:59,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-05 04:07:59,385 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-06-05 04:07:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:59,386 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-05 04:07:59,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:07:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-05 04:07:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:07:59,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:59,388 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:59,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:59,589 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:59,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:59,590 INFO L82 PathProgramCache]: Analyzing trace with hash 108860664, now seen corresponding path program 1 times [2021-06-05 04:07:59,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:59,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489895092] [2021-06-05 04:07:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:59,621 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 04:07:59,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:59,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489895092] [2021-06-05 04:07:59,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489895092] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:07:59,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:07:59,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:07:59,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550081498] [2021-06-05 04:07:59,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:07:59,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:59,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:07:59,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:07:59,624 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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 04:07:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:59,643 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-06-05 04:07:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:07:59,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) 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 04:07:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:59,645 INFO L225 Difference]: With dead ends: 29 [2021-06-05 04:07:59,646 INFO L226 Difference]: Without dead ends: 29 [2021-06-05 04:07:59,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:07:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-05 04:07:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-06-05 04:07:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-06-05 04:07:59,653 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-06-05 04:07:59,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:59,653 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-06-05 04:07:59,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) 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 04:07:59,653 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-06-05 04:07:59,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:07:59,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:59,654 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:59,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 04:07:59,654 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:59,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:59,655 INFO L82 PathProgramCache]: Analyzing trace with hash 152604519, now seen corresponding path program 4 times [2021-06-05 04:07:59,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:59,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069322580] [2021-06-05 04:07:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:59,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:59,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069322580] [2021-06-05 04:07:59,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069322580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:59,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231441329] [2021-06-05 04:07:59,723 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 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 04:07:59,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:07:59,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:59,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:59,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:59,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:07:59,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 04:07:59,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:07:59,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:07:59,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:07:59,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 04:07:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:59,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231441329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:59,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:59,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 04:07:59,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211710119] [2021-06-05 04:07:59,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:07:59,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:59,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:07:59,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:07:59,908 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:59,970 INFO L93 Difference]: Finished difference Result 39 states and 72 transitions. [2021-06-05 04:07:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:07:59,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:07:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:59,971 INFO L225 Difference]: With dead ends: 39 [2021-06-05 04:07:59,971 INFO L226 Difference]: Without dead ends: 34 [2021-06-05 04:07:59,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:07:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-06-05 04:07:59,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-06-05 04:07:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-06-05 04:07:59,979 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-06-05 04:07:59,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:59,980 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-06-05 04:07:59,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:59,980 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-06-05 04:07:59,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:07:59,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:59,981 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:00,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:00,197 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:00,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:00,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1747332011, now seen corresponding path program 5 times [2021-06-05 04:08:00,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:00,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345722208] [2021-06-05 04:08:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:00,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:00,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345722208] [2021-06-05 04:08:00,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345722208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:00,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093881309] [2021-06-05 04:08:00,262 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 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 04:08:00,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:00,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:00,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:08:00,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:00,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:00,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 04:08:00,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:00,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:00,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:00,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 04:08:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:00,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093881309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:00,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:00,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 04:08:00,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464885110] [2021-06-05 04:08:00,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:00,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:00,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:00,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:00,431 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:00,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:00,502 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-06-05 04:08:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:08:00,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:08:00,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:00,503 INFO L225 Difference]: With dead ends: 50 [2021-06-05 04:08:00,504 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 04:08:00,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:00,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 04:08:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-06-05 04:08:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-06-05 04:08:00,506 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-06-05 04:08:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:00,507 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-06-05 04:08:00,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-06-05 04:08:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:08:00,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:00,507 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:00,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 04:08:00,721 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:00,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1086068228, now seen corresponding path program 1 times [2021-06-05 04:08:00,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:00,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655111137] [2021-06-05 04:08:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:00,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:00,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655111137] [2021-06-05 04:08:00,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655111137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:00,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911982892] [2021-06-05 04:08:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:08:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:00,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 04:08:00,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:00,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911982892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:00,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:00,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 04:08:00,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59718229] [2021-06-05 04:08:00,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:08:00,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:00,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:08:00,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:08:00,805 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 04:08:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:00,841 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2021-06-05 04:08:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:08:00,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 12 [2021-06-05 04:08:00,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:00,842 INFO L225 Difference]: With dead ends: 58 [2021-06-05 04:08:00,842 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 04:08:00,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:08:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 04:08:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-06-05 04:08:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 32 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 04:08:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 64 transitions. [2021-06-05 04:08:00,845 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 64 transitions. Word has length 12 [2021-06-05 04:08:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:00,845 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 64 transitions. [2021-06-05 04:08:00,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 04:08:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 64 transitions. [2021-06-05 04:08:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:08:00,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:00,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:01,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:01,068 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:01,068 INFO L82 PathProgramCache]: Analyzing trace with hash -974791574, now seen corresponding path program 2 times [2021-06-05 04:08:01,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:01,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721370406] [2021-06-05 04:08:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:01,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:01,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721370406] [2021-06-05 04:08:01,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721370406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:01,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93444000] [2021-06-05 04:08:01,089 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 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 04:08:01,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:01,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:01,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 04:08:01,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:01,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93444000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:01,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:01,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 04:08:01,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819174435] [2021-06-05 04:08:01,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:08:01,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:01,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:08:01,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:08:01,156 INFO L87 Difference]: Start difference. First operand 33 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 04:08:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:01,194 INFO L93 Difference]: Finished difference Result 44 states and 85 transitions. [2021-06-05 04:08:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:08:01,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 12 [2021-06-05 04:08:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:01,197 INFO L225 Difference]: With dead ends: 44 [2021-06-05 04:08:01,197 INFO L226 Difference]: Without dead ends: 44 [2021-06-05 04:08:01,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:08:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-06-05 04:08:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-06-05 04:08:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 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 04:08:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 70 transitions. [2021-06-05 04:08:01,200 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 70 transitions. Word has length 12 [2021-06-05 04:08:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:01,200 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 70 transitions. [2021-06-05 04:08:01,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 04:08:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 70 transitions. [2021-06-05 04:08:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:08:01,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:01,201 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:01,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:01,417 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash 381267931, now seen corresponding path program 6 times [2021-06-05 04:08:01,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:01,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139951183] [2021-06-05 04:08:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:01,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:01,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139951183] [2021-06-05 04:08:01,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139951183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:01,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391825797] [2021-06-05 04:08:01,450 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 04:08:01,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:08:01,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:01,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:08:01,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:01,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391825797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:01,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:01,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:08:01,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938668358] [2021-06-05 04:08:01,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:08:01,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:08:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:08:01,532 INFO L87 Difference]: Start difference. First operand 35 states and 70 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:01,569 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2021-06-05 04:08:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:08:01,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 04:08:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:01,570 INFO L225 Difference]: With dead ends: 67 [2021-06-05 04:08:01,570 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 04:08:01,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:08:01,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 04:08:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 35. [2021-06-05 04:08:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2021-06-05 04:08:01,574 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 13 [2021-06-05 04:08:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:01,575 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2021-06-05 04:08:01,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2021-06-05 04:08:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:08:01,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:01,575 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:01,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 04:08:01,789 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:01,789 INFO L82 PathProgramCache]: Analyzing trace with hash 462398216, now seen corresponding path program 3 times [2021-06-05 04:08:01,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:01,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417497812] [2021-06-05 04:08:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:01,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:01,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417497812] [2021-06-05 04:08:01,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417497812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:01,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854286886] [2021-06-05 04:08:01,816 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 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 04:08:01,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:08:01,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:01,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:08:01,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:01,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854286886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:01,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:01,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:08:01,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532136205] [2021-06-05 04:08:01,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:08:01,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:01,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:08:01,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:08:01,880 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:01,945 INFO L93 Difference]: Finished difference Result 80 states and 140 transitions. [2021-06-05 04:08:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:08:01,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 04:08:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:01,946 INFO L225 Difference]: With dead ends: 80 [2021-06-05 04:08:01,946 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 04:08:01,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:01,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 04:08:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2021-06-05 04:08:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 85 transitions. [2021-06-05 04:08:01,949 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 85 transitions. Word has length 13 [2021-06-05 04:08:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:01,949 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 85 transitions. [2021-06-05 04:08:01,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 85 transitions. [2021-06-05 04:08:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:08:01,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:01,950 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:02,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:02,172 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:02,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:02,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1975995423, now seen corresponding path program 7 times [2021-06-05 04:08:02,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:02,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021115434] [2021-06-05 04:08:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:02,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:02,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021115434] [2021-06-05 04:08:02,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021115434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:02,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230289051] [2021-06-05 04:08:02,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:02,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:08:02,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:02,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230289051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:02,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:02,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:08:02,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163720944] [2021-06-05 04:08:02,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:08:02,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:02,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:08:02,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:08:02,285 INFO L87 Difference]: Start difference. First operand 40 states and 85 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:02,336 INFO L93 Difference]: Finished difference Result 51 states and 98 transitions. [2021-06-05 04:08:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:08:02,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 04:08:02,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:02,337 INFO L225 Difference]: With dead ends: 51 [2021-06-05 04:08:02,337 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 04:08:02,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:02,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 04:08:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-06-05 04:08:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 84 transitions. [2021-06-05 04:08:02,350 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 84 transitions. Word has length 13 [2021-06-05 04:08:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:02,351 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 84 transitions. [2021-06-05 04:08:02,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 84 transitions. [2021-06-05 04:08:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:08:02,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:02,354 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:02,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:02,578 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:02,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:02,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1314731640, now seen corresponding path program 4 times [2021-06-05 04:08:02,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:02,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101025930] [2021-06-05 04:08:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:02,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:02,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101025930] [2021-06-05 04:08:02,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101025930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:02,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920497343] [2021-06-05 04:08:02,611 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 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 04:08:02,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:02,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:02,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:08:02,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:02,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920497343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:02,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:02,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:08:02,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542139398] [2021-06-05 04:08:02,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:08:02,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:02,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:08:02,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:08:02,673 INFO L87 Difference]: Start difference. First operand 40 states and 84 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:02,711 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-06-05 04:08:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:08:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 04:08:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:02,712 INFO L225 Difference]: With dead ends: 68 [2021-06-05 04:08:02,712 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 04:08:02,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:08:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 04:08:02,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2021-06-05 04:08:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 76 transitions. [2021-06-05 04:08:02,714 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 76 transitions. Word has length 13 [2021-06-05 04:08:02,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:02,715 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 76 transitions. [2021-06-05 04:08:02,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 76 transitions. [2021-06-05 04:08:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:08:02,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:02,715 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:02,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 04:08:02,933 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:02,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1703307557, now seen corresponding path program 8 times [2021-06-05 04:08:02,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:02,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541379552] [2021-06-05 04:08:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:02,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:02,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541379552] [2021-06-05 04:08:02,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541379552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:02,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353706601] [2021-06-05 04:08:02,957 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 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 04:08:02,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:02,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:02,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:08:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:03,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353706601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:03,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:03,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:08:03,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46952585] [2021-06-05 04:08:03,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:08:03,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:03,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:08:03,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:08:03,012 INFO L87 Difference]: Start difference. First operand 38 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:03,078 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-06-05 04:08:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:08:03,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 04:08:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:03,080 INFO L225 Difference]: With dead ends: 51 [2021-06-05 04:08:03,080 INFO L226 Difference]: Without dead ends: 47 [2021-06-05 04:08:03,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-05 04:08:03,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-05 04:08:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 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 04:08:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-06-05 04:08:03,086 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-06-05 04:08:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:03,086 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-06-05 04:08:03,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-06-05 04:08:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:08:03,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:03,087 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:03,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 04:08:03,310 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash -746128162, now seen corresponding path program 5 times [2021-06-05 04:08:03,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:03,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833070307] [2021-06-05 04:08:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:03,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:03,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833070307] [2021-06-05 04:08:03,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833070307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:03,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379556995] [2021-06-05 04:08:03,377 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 04:08:03,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:03,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:03,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:08:03,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:03,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379556995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:03,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:03,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:08:03,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178122156] [2021-06-05 04:08:03,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:08:03,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:03,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:08:03,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:08:03,437 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:03,495 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-06-05 04:08:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:08:03,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 04:08:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:03,496 INFO L225 Difference]: With dead ends: 61 [2021-06-05 04:08:03,496 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 04:08:03,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 04:08:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-06-05 04:08:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 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 04:08:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-06-05 04:08:03,505 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-06-05 04:08:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:03,505 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-06-05 04:08:03,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-06-05 04:08:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:08:03,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:03,506 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:03,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 04:08:03,721 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash 202417055, now seen corresponding path program 9 times [2021-06-05 04:08:03,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:03,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005618952] [2021-06-05 04:08:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:03,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:03,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005618952] [2021-06-05 04:08:03,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005618952] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:08:03,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:08:03,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:08:03,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258210063] [2021-06-05 04:08:03,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:08:03,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:03,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:08:03,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:08:03,748 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:03,765 INFO L93 Difference]: Finished difference Result 42 states and 79 transitions. [2021-06-05 04:08:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:08:03,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:08:03,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:03,766 INFO L225 Difference]: With dead ends: 42 [2021-06-05 04:08:03,766 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 04:08:03,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:08:03,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 04:08:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-05 04:08:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 71 transitions. [2021-06-05 04:08:03,769 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 71 transitions. Word has length 13 [2021-06-05 04:08:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:03,769 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 71 transitions. [2021-06-05 04:08:03,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 71 transitions. [2021-06-05 04:08:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:08:03,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:03,769 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:03,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 04:08:03,770 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:03,770 INFO L82 PathProgramCache]: Analyzing trace with hash -208272584, now seen corresponding path program 6 times [2021-06-05 04:08:03,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:03,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273119493] [2021-06-05 04:08:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:03,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:03,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273119493] [2021-06-05 04:08:03,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273119493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:03,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612942002] [2021-06-05 04:08:03,796 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 04:08:03,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:08:03,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:03,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:08:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:03,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612942002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:03,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:03,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:08:03,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162151321] [2021-06-05 04:08:03,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:08:03,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:03,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:08:03,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:08:03,867 INFO L87 Difference]: Start difference. First operand 36 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:03,926 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2021-06-05 04:08:03,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:08:03,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 04:08:03,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:03,928 INFO L225 Difference]: With dead ends: 61 [2021-06-05 04:08:03,928 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 04:08:03,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:03,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 04:08:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2021-06-05 04:08:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 83 transitions. [2021-06-05 04:08:03,934 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 83 transitions. Word has length 13 [2021-06-05 04:08:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:03,935 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 83 transitions. [2021-06-05 04:08:03,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 83 transitions. [2021-06-05 04:08:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:03,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:03,935 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:04,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:04,154 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:04,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1038970604, now seen corresponding path program 7 times [2021-06-05 04:08:04,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:04,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674358536] [2021-06-05 04:08:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:04,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:04,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674358536] [2021-06-05 04:08:04,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674358536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:04,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528375743] [2021-06-05 04:08:04,222 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) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:04,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:04,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:04,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:04,424 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:04,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:04,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:04,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:04,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 04:08:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:04,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528375743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:04,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:04,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:04,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227262184] [2021-06-05 04:08:04,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:04,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:04,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:04,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:04,446 INFO L87 Difference]: Start difference. First operand 41 states and 83 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:04,564 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2021-06-05 04:08:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:08:04,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:04,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:04,565 INFO L225 Difference]: With dead ends: 56 [2021-06-05 04:08:04,565 INFO L226 Difference]: Without dead ends: 46 [2021-06-05 04:08:04,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:04,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-06-05 04:08:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-06-05 04:08:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 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 04:08:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 87 transitions. [2021-06-05 04:08:04,567 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 87 transitions. Word has length 14 [2021-06-05 04:08:04,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:04,567 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 87 transitions. [2021-06-05 04:08:04,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 87 transitions. [2021-06-05 04:08:04,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:04,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:04,568 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:04,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 04:08:04,781 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:04,781 INFO L82 PathProgramCache]: Analyzing trace with hash -186637180, now seen corresponding path program 8 times [2021-06-05 04:08:04,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:04,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412290580] [2021-06-05 04:08:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:04,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:04,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412290580] [2021-06-05 04:08:04,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412290580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:04,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451736077] [2021-06-05 04:08:04,855 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) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:04,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:04,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:04,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:04,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:05,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:05,050 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:05,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:05,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:05,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:05,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 04:08:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:05,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451736077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:05,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:05,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976158918] [2021-06-05 04:08:05,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:05,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:05,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:05,068 INFO L87 Difference]: Start difference. First operand 43 states and 87 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:05,255 INFO L93 Difference]: Finished difference Result 70 states and 143 transitions. [2021-06-05 04:08:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:05,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:05,256 INFO L225 Difference]: With dead ends: 70 [2021-06-05 04:08:05,256 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 04:08:05,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 04:08:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-06-05 04:08:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-06-05 04:08:05,258 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-06-05 04:08:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:05,259 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-06-05 04:08:05,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-06-05 04:08:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:05,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:05,259 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:05,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:05,473 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:05,473 INFO L82 PathProgramCache]: Analyzing trace with hash 556946180, now seen corresponding path program 9 times [2021-06-05 04:08:05,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:05,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458522932] [2021-06-05 04:08:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:05,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:05,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458522932] [2021-06-05 04:08:05,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458522932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:05,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268886935] [2021-06-05 04:08:05,557 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 04:08:05,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:08:05,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:05,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:05,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:05,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:05,743 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 04:08:05,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:05,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:08:05,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:05,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:05,808 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:05,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:05,835 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:08:05,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:05,835 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 04:08:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:05,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268886935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:05,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:05,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:05,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753760926] [2021-06-05 04:08:05,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:05,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:05,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:05,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:05,867 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:06,068 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-06-05 04:08:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:06,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:06,069 INFO L225 Difference]: With dead ends: 88 [2021-06-05 04:08:06,069 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 04:08:06,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 04:08:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-06-05 04:08:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-06-05 04:08:06,072 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-06-05 04:08:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:06,072 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-06-05 04:08:06,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-06-05 04:08:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:06,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:06,073 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:06,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:06,287 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:06,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2047470314, now seen corresponding path program 10 times [2021-06-05 04:08:06,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:06,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437235460] [2021-06-05 04:08:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:06,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:06,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437235460] [2021-06-05 04:08:06,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437235460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:06,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881931067] [2021-06-05 04:08:06,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:06,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:06,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:06,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:06,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:06,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:06,530 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:06,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:06,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:06,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:06,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 04:08:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:06,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881931067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:06,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:06,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:06,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682649743] [2021-06-05 04:08:06,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:06,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:06,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:06,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:06,549 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:06,744 INFO L93 Difference]: Finished difference Result 76 states and 163 transitions. [2021-06-05 04:08:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:06,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:06,745 INFO L225 Difference]: With dead ends: 76 [2021-06-05 04:08:06,745 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 04:08:06,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 04:08:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-06-05 04:08:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2021-06-05 04:08:06,748 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 14 [2021-06-05 04:08:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:06,748 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2021-06-05 04:08:06,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:06,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2021-06-05 04:08:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:06,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:06,749 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:06,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 04:08:06,969 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:06,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1503913622, now seen corresponding path program 11 times [2021-06-05 04:08:06,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:06,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859900433] [2021-06-05 04:08:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:07,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:07,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859900433] [2021-06-05 04:08:07,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859900433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:07,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745945785] [2021-06-05 04:08:07,044 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 04:08:07,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:08:07,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:07,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:07,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:07,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:07,239 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 04:08:07,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:07,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:08:07,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:07,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:07,296 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:07,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:07,320 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:08:07,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:07,321 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 04:08:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:07,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745945785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:07,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:07,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:07,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218619756] [2021-06-05 04:08:07,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:07,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:07,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:07,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:07,357 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:07,581 INFO L93 Difference]: Finished difference Result 101 states and 211 transitions. [2021-06-05 04:08:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:07,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:07,582 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:08:07,582 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:08:07,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:08:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:08:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-06-05 04:08:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-06-05 04:08:07,584 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-06-05 04:08:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:07,584 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-06-05 04:08:07,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-06-05 04:08:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:07,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:07,585 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:07,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 04:08:07,793 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash -652769490, now seen corresponding path program 12 times [2021-06-05 04:08:07,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:07,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371410573] [2021-06-05 04:08:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:07,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:07,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371410573] [2021-06-05 04:08:07,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371410573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:07,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829603376] [2021-06-05 04:08:07,852 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 04:08:07,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:08:07,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:07,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:07,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:08,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:08,040 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 04:08:08,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:08,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:08:08,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:08,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:08,080 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:08,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:08,104 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:08:08,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:08,105 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 04:08:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:08,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829603376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:08,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:08,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:08,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859700027] [2021-06-05 04:08:08,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:08,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:08,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:08,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:08,132 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:08,351 INFO L93 Difference]: Finished difference Result 80 states and 179 transitions. [2021-06-05 04:08:08,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:08,352 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:08,352 INFO L225 Difference]: With dead ends: 80 [2021-06-05 04:08:08,352 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 04:08:08,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:08,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 04:08:08,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-06-05 04:08:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-06-05 04:08:08,355 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-06-05 04:08:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:08,355 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-06-05 04:08:08,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-06-05 04:08:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:08,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:08,356 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:08,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 04:08:08,569 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:08,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:08,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1709641404, now seen corresponding path program 13 times [2021-06-05 04:08:08,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:08,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895737716] [2021-06-05 04:08:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:08,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:08,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895737716] [2021-06-05 04:08:08,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895737716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:08,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549407353] [2021-06-05 04:08:08,637 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 04:08:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:08,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:08,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:08,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:08,804 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:08,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:08,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:08,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:08,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 04:08:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:08,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549407353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:08,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:08,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:08,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307166088] [2021-06-05 04:08:08,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:08,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:08,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:08,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:08,819 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:09,003 INFO L93 Difference]: Finished difference Result 81 states and 183 transitions. [2021-06-05 04:08:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:09,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:09,004 INFO L225 Difference]: With dead ends: 81 [2021-06-05 04:08:09,004 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 04:08:09,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 04:08:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-06-05 04:08:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 04:08:09,011 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 04:08:09,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:09,011 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 04:08:09,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 04:08:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:09,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:09,012 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:09,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:09,212 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash -966058044, now seen corresponding path program 14 times [2021-06-05 04:08:09,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:09,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814466669] [2021-06-05 04:08:09,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:09,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:09,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814466669] [2021-06-05 04:08:09,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814466669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:09,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779052273] [2021-06-05 04:08:09,271 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 04:08:09,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:09,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:09,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:09,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:09,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:09,438 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 04:08:09,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:09,458 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:08:09,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:09,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:09,472 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:09,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:09,496 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:08:09,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:09,497 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 04:08:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:09,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779052273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:09,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:09,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:09,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948022644] [2021-06-05 04:08:09,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:09,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:09,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:09,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:09,526 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:09,785 INFO L93 Difference]: Finished difference Result 102 states and 228 transitions. [2021-06-05 04:08:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:09,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:09,786 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:08:09,786 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:08:09,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:08:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2021-06-05 04:08:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 04:08:09,789 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 04:08:09,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:09,789 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 04:08:09,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:09,789 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 04:08:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:09,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:09,789 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:09,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:09,997 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash -114913912, now seen corresponding path program 15 times [2021-06-05 04:08:09,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:09,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705889708] [2021-06-05 04:08:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:10,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:10,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705889708] [2021-06-05 04:08:10,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705889708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:10,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910047257] [2021-06-05 04:08:10,064 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 04:08:10,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:08:10,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:10,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:10,236 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 04:08:10,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:10,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:08:10,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:10,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:10,273 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:10,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:10,297 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:08:10,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:10,298 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 04:08:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:10,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910047257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:10,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:10,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:10,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706182320] [2021-06-05 04:08:10,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:10,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:10,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:10,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:10,325 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:10,556 INFO L93 Difference]: Finished difference Result 84 states and 193 transitions. [2021-06-05 04:08:10,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:08:10,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:10,557 INFO L225 Difference]: With dead ends: 84 [2021-06-05 04:08:10,557 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:08:10,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:08:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:08:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-06-05 04:08:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 04:08:10,559 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 04:08:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:10,559 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 04:08:10,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 04:08:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:10,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:10,560 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:10,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 04:08:10,765 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:10,765 INFO L82 PathProgramCache]: Analyzing trace with hash 500750404, now seen corresponding path program 16 times [2021-06-05 04:08:10,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:10,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715474173] [2021-06-05 04:08:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:10,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:10,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715474173] [2021-06-05 04:08:10,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715474173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:10,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058469294] [2021-06-05 04:08:10,826 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 04:08:10,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:10,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:10,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:10,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:11,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:11,008 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 04:08:11,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:11,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:08:11,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:11,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:11,059 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:11,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:11,080 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:08:11,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:11,080 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 04:08:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:11,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058469294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:11,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:11,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:11,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331147492] [2021-06-05 04:08:11,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:11,110 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:11,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:11,322 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2021-06-05 04:08:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:11,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:11,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:11,323 INFO L225 Difference]: With dead ends: 96 [2021-06-05 04:08:11,323 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:08:11,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:08:11,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:08:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2021-06-05 04:08:11,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 04:08:11,326 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 04:08:11,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:11,326 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 04:08:11,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 04:08:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:11,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:11,326 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:11,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:11,547 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:11,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2078979626, now seen corresponding path program 17 times [2021-06-05 04:08:11,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:11,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67515954] [2021-06-05 04:08:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:11,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:11,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67515954] [2021-06-05 04:08:11,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67515954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:11,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378088621] [2021-06-05 04:08:11,606 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 04:08:11,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:08:11,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:08:11,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:11,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:11,821 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:11,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:11,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:11,831 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 04:08:11,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-06-05 04:08:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:11,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378088621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:11,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:11,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:11,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910109009] [2021-06-05 04:08:11,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:11,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:11,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:11,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:11,837 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:12,071 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2021-06-05 04:08:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:12,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:12,072 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:08:12,072 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 04:08:12,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 04:08:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-06-05 04:08:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 04:08:12,075 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 04:08:12,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:12,075 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 04:08:12,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 04:08:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:12,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:12,075 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:12,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 04:08:12,276 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1472404310, now seen corresponding path program 18 times [2021-06-05 04:08:12,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:12,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056941877] [2021-06-05 04:08:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:12,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:12,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056941877] [2021-06-05 04:08:12,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056941877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:12,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881726630] [2021-06-05 04:08:12,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:12,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:08:12,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:12,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:12,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:12,490 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 04:08:12,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:12,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:08:12,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:12,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:12,530 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:12,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:12,554 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:08:12,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:12,555 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 04:08:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:12,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881726630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:12,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:12,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:12,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916592399] [2021-06-05 04:08:12,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:12,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:12,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:12,585 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:12,838 INFO L93 Difference]: Finished difference Result 112 states and 263 transitions. [2021-06-05 04:08:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:08:12,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:12,839 INFO L225 Difference]: With dead ends: 112 [2021-06-05 04:08:12,839 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:08:12,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:08:12,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:08:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-06-05 04:08:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 04:08:12,842 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 04:08:12,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:12,842 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 04:08:12,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:12,842 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 04:08:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:12,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:12,842 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:13,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 04:08:13,061 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:13,061 INFO L82 PathProgramCache]: Analyzing trace with hash -621260178, now seen corresponding path program 19 times [2021-06-05 04:08:13,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:13,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536729934] [2021-06-05 04:08:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:13,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:13,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536729934] [2021-06-05 04:08:13,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536729934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:13,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799969300] [2021-06-05 04:08:13,128 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 04:08:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:13,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:13,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:13,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:13,301 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 04:08:13,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:13,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:08:13,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:13,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:13,335 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:13,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:13,358 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:08:13,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:13,359 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 04:08:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:13,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799969300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:13,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:13,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:13,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580901710] [2021-06-05 04:08:13,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:13,386 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:13,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:13,576 INFO L93 Difference]: Finished difference Result 97 states and 233 transitions. [2021-06-05 04:08:13,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:13,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:13,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:13,577 INFO L225 Difference]: With dead ends: 97 [2021-06-05 04:08:13,577 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:08:13,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:08:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2021-06-05 04:08:13,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 04:08:13,580 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 04:08:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:13,580 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 04:08:13,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 04:08:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:13,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:13,581 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:13,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 04:08:13,782 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:13,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:13,782 INFO L82 PathProgramCache]: Analyzing trace with hash -5595862, now seen corresponding path program 20 times [2021-06-05 04:08:13,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:13,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402464872] [2021-06-05 04:08:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:13,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:13,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402464872] [2021-06-05 04:08:13,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402464872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:13,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815774842] [2021-06-05 04:08:13,853 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 04:08:13,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:13,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:13,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:13,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:14,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:14,014 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 04:08:14,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:14,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:08:14,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:14,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:14,068 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:14,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:14,091 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:08:14,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:14,091 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 04:08:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:14,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815774842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:14,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:14,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:14,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621243217] [2021-06-05 04:08:14,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:14,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:14,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:14,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:14,115 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:14,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:14,380 INFO L93 Difference]: Finished difference Result 107 states and 254 transitions. [2021-06-05 04:08:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:14,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:14,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:14,381 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:08:14,381 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:08:14,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:14,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:08:14,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-06-05 04:08:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:14,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 04:08:14,383 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 04:08:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:14,384 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 04:08:14,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 04:08:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:08:14,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:14,384 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:14,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:14,585 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:14,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1900128750, now seen corresponding path program 21 times [2021-06-05 04:08:14,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:14,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736755219] [2021-06-05 04:08:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:14,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:14,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736755219] [2021-06-05 04:08:14,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736755219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:14,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37322761] [2021-06-05 04:08:14,651 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 04:08:14,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:08:14,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:14,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:08:14,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:14,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:14,827 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 04:08:14,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:14,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:08:14,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:14,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:14,863 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:08:14,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:14,886 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:08:14,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:14,887 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 04:08:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:14,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37322761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:14,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:14,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:08:14,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849257291] [2021-06-05 04:08:14,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:14,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:14,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:14,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:14,920 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:15,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:15,212 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2021-06-05 04:08:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:15,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:08:15,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:15,214 INFO L225 Difference]: With dead ends: 112 [2021-06-05 04:08:15,214 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:08:15,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:08:15,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-06-05 04:08:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.5652173913043477) internal successors, (177), 69 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2021-06-05 04:08:15,216 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 14 [2021-06-05 04:08:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:15,216 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2021-06-05 04:08:15,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:15,217 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2021-06-05 04:08:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:15,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:15,217 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:15,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 04:08:15,418 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:15,418 INFO L82 PathProgramCache]: Analyzing trace with hash -336763768, now seen corresponding path program 22 times [2021-06-05 04:08:15,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:15,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360309218] [2021-06-05 04:08:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:15,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:15,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360309218] [2021-06-05 04:08:15,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360309218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:15,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745325325] [2021-06-05 04:08:15,502 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 04:08:15,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:15,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:15,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:15,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:15,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:15,681 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:15,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:15,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:15,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:15,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:08:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:15,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745325325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:15,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:15,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:15,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515842802] [2021-06-05 04:08:15,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:15,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:15,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:15,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:15,726 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:15,906 INFO L93 Difference]: Finished difference Result 95 states and 224 transitions. [2021-06-05 04:08:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:15,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:15,907 INFO L225 Difference]: With dead ends: 95 [2021-06-05 04:08:15,907 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:08:15,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:08:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:08:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-06-05 04:08:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5416666666666665) internal successors, (183), 72 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-06-05 04:08:15,910 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 15 [2021-06-05 04:08:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:15,910 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-06-05 04:08:15,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-06-05 04:08:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:15,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:15,910 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:16,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:16,121 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:16,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash 515569656, now seen corresponding path program 23 times [2021-06-05 04:08:16,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:16,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793037348] [2021-06-05 04:08:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:16,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:16,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793037348] [2021-06-05 04:08:16,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793037348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:16,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108567952] [2021-06-05 04:08:16,201 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 04:08:16,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:08:16,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:16,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:16,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:16,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:16,385 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:16,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:16,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:16,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:16,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:08:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:16,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108567952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:16,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:16,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:16,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64864033] [2021-06-05 04:08:16,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:16,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:16,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:16,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:16,417 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:16,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:16,643 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2021-06-05 04:08:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:16,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:16,644 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:08:16,644 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:08:16,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:08:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-06-05 04:08:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-06-05 04:08:16,646 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-06-05 04:08:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:16,646 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-06-05 04:08:16,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-06-05 04:08:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:16,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:16,647 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:16,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:16,847 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1259153016, now seen corresponding path program 24 times [2021-06-05 04:08:16,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:16,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967837277] [2021-06-05 04:08:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:16,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:16,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967837277] [2021-06-05 04:08:16,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967837277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:16,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22856806] [2021-06-05 04:08:16,951 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 04:08:16,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:08:16,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:16,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:16,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:17,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:17,130 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:17,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:17,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:17,181 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:17,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:17,277 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:17,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:17,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:17,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22856806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:17,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:17,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:17,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448455707] [2021-06-05 04:08:17,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:17,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:17,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:17,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:17,311 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:17,575 INFO L93 Difference]: Finished difference Result 112 states and 256 transitions. [2021-06-05 04:08:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:08:17,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:17,576 INFO L225 Difference]: With dead ends: 112 [2021-06-05 04:08:17,576 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:08:17,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:08:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:08:17,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-06-05 04:08:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-06-05 04:08:17,579 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-06-05 04:08:17,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:17,579 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-06-05 04:08:17,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:17,579 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-06-05 04:08:17,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:17,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:17,580 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:17,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 04:08:17,797 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:17,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash 49437346, now seen corresponding path program 25 times [2021-06-05 04:08:17,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:17,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903363796] [2021-06-05 04:08:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:17,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:17,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903363796] [2021-06-05 04:08:17,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903363796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:17,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867475176] [2021-06-05 04:08:17,868 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 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 04:08:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:17,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:17,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:18,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:18,043 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:18,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:18,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:18,098 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:18,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:18,188 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:18,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:18,189 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:18,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867475176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:18,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:18,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 04:08:18,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601218239] [2021-06-05 04:08:18,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:18,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:18,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:18,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:18,220 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:18,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:18,521 INFO L93 Difference]: Finished difference Result 128 states and 283 transitions. [2021-06-05 04:08:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:08:18,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:18,522 INFO L225 Difference]: With dead ends: 128 [2021-06-05 04:08:18,522 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 04:08:18,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:08:18,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 04:08:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2021-06-05 04:08:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.539473684210526) internal successors, (193), 76 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2021-06-05 04:08:18,527 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 15 [2021-06-05 04:08:18,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:18,527 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2021-06-05 04:08:18,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2021-06-05 04:08:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:18,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:18,528 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:18,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 04:08:18,741 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:18,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:18,741 INFO L82 PathProgramCache]: Analyzing trace with hash -611826437, now seen corresponding path program 26 times [2021-06-05 04:08:18,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:18,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371355944] [2021-06-05 04:08:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:18,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:18,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371355944] [2021-06-05 04:08:18,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371355944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279868512] [2021-06-05 04:08:18,773 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 04:08:18,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:18,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:18,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:08:18,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:18,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279868512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:18,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:18,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 04:08:18,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602492322] [2021-06-05 04:08:18,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:08:18,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:18,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:08:18,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:08:18,821 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:18,871 INFO L93 Difference]: Finished difference Result 163 states and 339 transitions. [2021-06-05 04:08:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:08:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:18,872 INFO L225 Difference]: With dead ends: 163 [2021-06-05 04:08:18,872 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 04:08:18,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 04:08:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 82. [2021-06-05 04:08:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.617283950617284) internal successors, (212), 81 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 212 transitions. [2021-06-05 04:08:18,876 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 212 transitions. Word has length 15 [2021-06-05 04:08:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:18,876 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 212 transitions. [2021-06-05 04:08:18,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 212 transitions. [2021-06-05 04:08:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:18,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:18,877 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:19,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 04:08:19,099 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:19,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1007434568, now seen corresponding path program 27 times [2021-06-05 04:08:19,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:19,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250733283] [2021-06-05 04:08:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:19,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:19,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250733283] [2021-06-05 04:08:19,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250733283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:19,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16930880] [2021-06-05 04:08:19,218 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 04:08:19,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:08:19,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:19,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:19,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:19,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:19,405 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:19,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:19,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:19,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:19,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:08:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:19,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16930880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:19,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:19,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:19,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045035241] [2021-06-05 04:08:19,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:19,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:19,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:19,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:19,436 INFO L87 Difference]: Start difference. First operand 82 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:19,724 INFO L93 Difference]: Finished difference Result 95 states and 233 transitions. [2021-06-05 04:08:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:19,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:19,725 INFO L225 Difference]: With dead ends: 95 [2021-06-05 04:08:19,725 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:08:19,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 342.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:08:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:08:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-06-05 04:08:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-05 04:08:19,727 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-05 04:08:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:19,727 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-05 04:08:19,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:19,728 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-05 04:08:19,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:19,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:19,728 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:19,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:19,952 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:19,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash -263851208, now seen corresponding path program 28 times [2021-06-05 04:08:19,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:19,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840723099] [2021-06-05 04:08:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:20,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:20,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840723099] [2021-06-05 04:08:20,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840723099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:20,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569180503] [2021-06-05 04:08:20,056 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) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:20,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:20,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:20,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:20,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:20,220 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:20,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:20,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:20,273 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:20,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:20,375 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:20,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:20,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:20,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569180503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:20,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:20,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:20,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837640740] [2021-06-05 04:08:20,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:20,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:20,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:20,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:20,409 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:20,730 INFO L93 Difference]: Finished difference Result 118 states and 273 transitions. [2021-06-05 04:08:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:20,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:20,732 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:08:20,732 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 04:08:20,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 314.7ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:08:20,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 04:08:20,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-06-05 04:08:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-05 04:08:20,734 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-05 04:08:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:20,734 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-05 04:08:20,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-05 04:08:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:20,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:20,735 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:20,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 04:08:20,949 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:20,949 INFO L82 PathProgramCache]: Analyzing trace with hash 587292924, now seen corresponding path program 29 times [2021-06-05 04:08:20,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:20,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139408279] [2021-06-05 04:08:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:21,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:21,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139408279] [2021-06-05 04:08:21,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139408279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:21,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291103640] [2021-06-05 04:08:21,019 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 04:08:21,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:08:21,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:21,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:21,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:21,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:21,203 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:21,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:21,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:21,269 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:21,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:21,336 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:21,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:21,337 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:21,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291103640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:21,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:21,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:21,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828902969] [2021-06-05 04:08:21,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:21,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:21,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:21,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:21,365 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:21,669 INFO L93 Difference]: Finished difference Result 140 states and 313 transitions. [2021-06-05 04:08:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:08:21,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:21,670 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:08:21,670 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:08:21,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:08:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2021-06-05 04:08:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-05 04:08:21,673 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-05 04:08:21,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:21,673 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-05 04:08:21,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-05 04:08:21,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:21,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:21,674 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:21,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 04:08:21,874 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:21,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1202957240, now seen corresponding path program 30 times [2021-06-05 04:08:21,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:21,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040145334] [2021-06-05 04:08:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:21,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:21,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040145334] [2021-06-05 04:08:21,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040145334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:21,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885319768] [2021-06-05 04:08:21,953 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 04:08:21,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:08:21,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:21,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:21,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:22,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:22,145 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:22,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:22,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:22,201 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:22,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:22,325 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:22,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:22,325 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:22,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885319768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:22,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:22,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:22,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637130068] [2021-06-05 04:08:22,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:22,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:22,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:22,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:22,367 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:22,838 INFO L93 Difference]: Finished difference Result 157 states and 342 transitions. [2021-06-05 04:08:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:08:22,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:22,839 INFO L225 Difference]: With dead ends: 157 [2021-06-05 04:08:22,839 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:08:22,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:08:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:08:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 84. [2021-06-05 04:08:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5903614457831323) internal successors, (215), 83 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 215 transitions. [2021-06-05 04:08:22,842 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 215 transitions. Word has length 15 [2021-06-05 04:08:22,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:22,842 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 215 transitions. [2021-06-05 04:08:22,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 215 transitions. [2021-06-05 04:08:22,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:22,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:22,843 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:23,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 04:08:23,043 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:23,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2134830661, now seen corresponding path program 31 times [2021-06-05 04:08:23,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:23,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574245545] [2021-06-05 04:08:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:23,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:23,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574245545] [2021-06-05 04:08:23,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574245545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:23,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112471128] [2021-06-05 04:08:23,076 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 04:08:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:23,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:08:23,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:23,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112471128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:23,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:23,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:08:23,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729164799] [2021-06-05 04:08:23,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:23,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:23,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:23,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:23,136 INFO L87 Difference]: Start difference. First operand 84 states and 215 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:23,207 INFO L93 Difference]: Finished difference Result 200 states and 410 transitions. [2021-06-05 04:08:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:08:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:23,209 INFO L225 Difference]: With dead ends: 200 [2021-06-05 04:08:23,209 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:08:23,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:08:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:08:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 93. [2021-06-05 04:08:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6739130434782608) internal successors, (246), 92 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 246 transitions. [2021-06-05 04:08:23,213 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 246 transitions. Word has length 15 [2021-06-05 04:08:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:23,214 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 246 transitions. [2021-06-05 04:08:23,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 246 transitions. [2021-06-05 04:08:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:23,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:23,215 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:23,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:23,434 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:23,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1513780834, now seen corresponding path program 32 times [2021-06-05 04:08:23,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:23,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629400739] [2021-06-05 04:08:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:23,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:23,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629400739] [2021-06-05 04:08:23,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629400739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:23,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208827396] [2021-06-05 04:08:23,525 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 04:08:23,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:23,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:23,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:23,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:23,689 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:23,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:23,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:23,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:23,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:08:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:23,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208827396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:23,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:23,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972143410] [2021-06-05 04:08:23,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:23,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:23,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:23,734 INFO L87 Difference]: Start difference. First operand 93 states and 246 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:23,942 INFO L93 Difference]: Finished difference Result 107 states and 271 transitions. [2021-06-05 04:08:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:23,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:23,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:23,943 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:08:23,943 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:08:23,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 262.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:08:23,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:08:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-06-05 04:08:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 04:08:23,946 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 04:08:23,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:23,946 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 04:08:23,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 04:08:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:23,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:23,946 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:24,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:24,161 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:24,161 INFO L82 PathProgramCache]: Analyzing trace with hash -770197474, now seen corresponding path program 33 times [2021-06-05 04:08:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:24,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436383105] [2021-06-05 04:08:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:24,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:24,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436383105] [2021-06-05 04:08:24,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436383105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:24,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848066698] [2021-06-05 04:08:24,268 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 04:08:24,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:08:24,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:24,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:24,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:24,429 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:24,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:24,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:24,500 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:24,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:24,651 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:24,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:24,652 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:24,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848066698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:24,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:24,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:24,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816346557] [2021-06-05 04:08:24,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:24,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:24,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:24,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:24,701 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:25,037 INFO L93 Difference]: Finished difference Result 135 states and 326 transitions. [2021-06-05 04:08:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:08:25,038 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:25,038 INFO L225 Difference]: With dead ends: 135 [2021-06-05 04:08:25,038 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 04:08:25,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:08:25,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 04:08:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2021-06-05 04:08:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 04:08:25,042 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 04:08:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:25,042 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 04:08:25,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 04:08:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:25,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:25,042 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:25,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:25,253 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash 80946658, now seen corresponding path program 34 times [2021-06-05 04:08:25,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:25,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729092269] [2021-06-05 04:08:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:25,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:25,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729092269] [2021-06-05 04:08:25,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729092269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:25,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767793950] [2021-06-05 04:08:25,323 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 04:08:25,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:25,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:25,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:25,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:25,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:25,482 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:25,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:25,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:25,556 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:25,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:25,650 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:25,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:25,651 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:25,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767793950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:25,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:25,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:25,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117234654] [2021-06-05 04:08:25,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:25,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:25,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:25,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:25,682 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:26,067 INFO L93 Difference]: Finished difference Result 158 states and 363 transitions. [2021-06-05 04:08:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:08:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:26,068 INFO L225 Difference]: With dead ends: 158 [2021-06-05 04:08:26,069 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 04:08:26,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:08:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 04:08:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2021-06-05 04:08:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 04:08:26,072 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 04:08:26,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:26,072 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 04:08:26,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:26,072 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 04:08:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:26,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:26,072 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:26,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 04:08:26,281 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:26,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:26,281 INFO L82 PathProgramCache]: Analyzing trace with hash 696610974, now seen corresponding path program 35 times [2021-06-05 04:08:26,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:26,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385498678] [2021-06-05 04:08:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:26,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:26,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385498678] [2021-06-05 04:08:26,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385498678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:26,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006646490] [2021-06-05 04:08:26,347 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 04:08:26,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:08:26,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:26,371 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:26,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:26,532 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:26,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:26,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:26,584 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:26,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:26,666 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:26,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:26,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:26,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006646490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:26,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:26,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:26,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000114116] [2021-06-05 04:08:26,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:26,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:26,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:26,691 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:27,150 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2021-06-05 04:08:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:08:27,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:27,151 INFO L225 Difference]: With dead ends: 169 [2021-06-05 04:08:27,151 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 04:08:27,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:08:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 04:08:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2021-06-05 04:08:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 04:08:27,154 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 04:08:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:27,154 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 04:08:27,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 04:08:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:27,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:27,155 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:27,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-05 04:08:27,373 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1692631710, now seen corresponding path program 36 times [2021-06-05 04:08:27,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:27,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037694602] [2021-06-05 04:08:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:27,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:27,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037694602] [2021-06-05 04:08:27,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037694602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:27,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005896275] [2021-06-05 04:08:27,451 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 04:08:27,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:08:27,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:27,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:27,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:27,664 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:27,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:27,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:27,718 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:27,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:27,797 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:27,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:27,798 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:27,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005896275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:27,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:27,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:27,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926629023] [2021-06-05 04:08:27,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:27,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:27,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:27,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:27,823 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:28,206 INFO L93 Difference]: Finished difference Result 140 states and 323 transitions. [2021-06-05 04:08:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:08:28,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:28,207 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:08:28,207 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:08:28,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 455.3ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:08:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:08:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2021-06-05 04:08:28,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.6382978723404253) internal successors, (248), 94 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 248 transitions. [2021-06-05 04:08:28,210 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 248 transitions. Word has length 15 [2021-06-05 04:08:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:28,210 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 248 transitions. [2021-06-05 04:08:28,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:28,211 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 248 transitions. [2021-06-05 04:08:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:28,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:28,211 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:28,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 04:08:28,425 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:28,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2103321349, now seen corresponding path program 37 times [2021-06-05 04:08:28,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:28,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700544611] [2021-06-05 04:08:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:28,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:28,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700544611] [2021-06-05 04:08:28,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700544611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:28,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522031627] [2021-06-05 04:08:28,452 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 04:08:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:08:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:28,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522031627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:28,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:28,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:08:28,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360861801] [2021-06-05 04:08:28,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:28,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:28,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:28,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:28,516 INFO L87 Difference]: Start difference. First operand 95 states and 248 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:28,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:28,600 INFO L93 Difference]: Finished difference Result 170 states and 379 transitions. [2021-06-05 04:08:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:08:28,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:28,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:28,601 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:08:28,601 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 04:08:28,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 04:08:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 102. [2021-06-05 04:08:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-06-05 04:08:28,604 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-06-05 04:08:28,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:28,604 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-06-05 04:08:28,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:28,605 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-06-05 04:08:28,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:28,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:28,605 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:28,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-06-05 04:08:28,827 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:28,827 INFO L82 PathProgramCache]: Analyzing trace with hash -30645896, now seen corresponding path program 38 times [2021-06-05 04:08:28,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:28,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990864836] [2021-06-05 04:08:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:28,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:28,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990864836] [2021-06-05 04:08:28,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990864836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:28,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295326940] [2021-06-05 04:08:28,920 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 04:08:28,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:28,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:28,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:29,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:29,095 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:29,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:29,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:29,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:29,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:08:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:29,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295326940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:29,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:29,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:29,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736968822] [2021-06-05 04:08:29,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:29,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:29,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:29,124 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:29,285 INFO L93 Difference]: Finished difference Result 120 states and 308 transitions. [2021-06-05 04:08:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:29,286 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:29,286 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:08:29,286 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:08:29,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:08:29,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:08:29,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-06-05 04:08:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-06-05 04:08:29,289 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-06-05 04:08:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:29,289 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-06-05 04:08:29,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-06-05 04:08:29,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:29,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:29,290 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:29,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable647 [2021-06-05 04:08:29,512 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:29,512 INFO L82 PathProgramCache]: Analyzing trace with hash 712937464, now seen corresponding path program 39 times [2021-06-05 04:08:29,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:29,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019261937] [2021-06-05 04:08:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:29,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:29,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019261937] [2021-06-05 04:08:29,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019261937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:29,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491503128] [2021-06-05 04:08:29,602 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 04:08:29,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:08:29,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:29,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:29,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:29,745 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:29,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:29,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:29,819 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:29,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:29,880 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:29,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:29,881 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:29,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491503128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:29,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:29,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:29,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232684435] [2021-06-05 04:08:29,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:29,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:29,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:29,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:29,911 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:30,217 INFO L93 Difference]: Finished difference Result 154 states and 382 transitions. [2021-06-05 04:08:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:08:30,217 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:30,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:30,218 INFO L225 Difference]: With dead ends: 154 [2021-06-05 04:08:30,218 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 04:08:30,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:08:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 04:08:30,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2021-06-05 04:08:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-06-05 04:08:30,221 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-06-05 04:08:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:30,221 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-06-05 04:08:30,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-06-05 04:08:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:30,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:30,222 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:30,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:30,444 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1564081596, now seen corresponding path program 40 times [2021-06-05 04:08:30,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:30,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48605672] [2021-06-05 04:08:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:30,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:30,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48605672] [2021-06-05 04:08:30,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48605672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:30,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943201729] [2021-06-05 04:08:30,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:30,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:30,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:30,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:30,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:30,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:30,696 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:30,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:30,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:30,761 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:30,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:30,833 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:30,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:30,834 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943201729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:30,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:30,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:30,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281574674] [2021-06-05 04:08:30,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:30,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:30,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:30,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:30,859 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:31,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:31,312 INFO L93 Difference]: Finished difference Result 176 states and 417 transitions. [2021-06-05 04:08:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:08:31,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:31,314 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:08:31,314 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:08:31,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 410.2ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:08:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:08:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 103. [2021-06-05 04:08:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-06-05 04:08:31,317 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-06-05 04:08:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:31,317 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-06-05 04:08:31,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-06-05 04:08:31,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:31,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:31,318 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:31,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:31,533 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:31,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:31,533 INFO L82 PathProgramCache]: Analyzing trace with hash 902817813, now seen corresponding path program 41 times [2021-06-05 04:08:31,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:31,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941906896] [2021-06-05 04:08:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:31,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:31,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941906896] [2021-06-05 04:08:31,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941906896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:31,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730629794] [2021-06-05 04:08:31,560 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 04:08:31,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:08:31,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:31,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:08:31,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:31,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730629794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:31,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:31,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 04:08:31,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835595471] [2021-06-05 04:08:31,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:08:31,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:31,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:08:31,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:08:31,606 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:31,640 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2021-06-05 04:08:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:08:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:31,641 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:08:31,641 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 04:08:31,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 04:08:31,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 121. [2021-06-05 04:08:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.7666666666666666) internal successors, (332), 120 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:31,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 332 transitions. [2021-06-05 04:08:31,644 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 332 transitions. Word has length 15 [2021-06-05 04:08:31,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:31,644 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 332 transitions. [2021-06-05 04:08:31,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 332 transitions. [2021-06-05 04:08:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:31,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:31,645 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:31,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-06-05 04:08:31,866 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:31,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2115221384, now seen corresponding path program 42 times [2021-06-05 04:08:31,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:31,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887173929] [2021-06-05 04:08:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:31,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:31,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887173929] [2021-06-05 04:08:31,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887173929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:31,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69058606] [2021-06-05 04:08:31,936 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 04:08:31,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:08:31,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:31,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:31,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:32,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:32,108 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:32,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:32,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:32,155 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:32,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:32,255 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:32,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:32,256 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:32,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69058606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:32,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:32,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:32,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186819999] [2021-06-05 04:08:32,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:32,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:32,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:32,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:32,280 INFO L87 Difference]: Start difference. First operand 121 states and 332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:32,766 INFO L93 Difference]: Finished difference Result 209 states and 492 transitions. [2021-06-05 04:08:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:08:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:32,767 INFO L225 Difference]: With dead ends: 209 [2021-06-05 04:08:32,767 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:08:32,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 448.9ms TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:08:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:08:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 120. [2021-06-05 04:08:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.764705882352941) internal successors, (329), 119 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 329 transitions. [2021-06-05 04:08:32,770 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 329 transitions. Word has length 15 [2021-06-05 04:08:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:32,770 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 329 transitions. [2021-06-05 04:08:32,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 329 transitions. [2021-06-05 04:08:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:32,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:32,771 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:32,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-05 04:08:32,985 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041989, now seen corresponding path program 43 times [2021-06-05 04:08:32,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:32,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769124693] [2021-06-05 04:08:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:33,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769124693] [2021-06-05 04:08:33,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769124693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306303869] [2021-06-05 04:08:33,012 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 04:08:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:33,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:08:33,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:33,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306303869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:33,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:33,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:08:33,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792877255] [2021-06-05 04:08:33,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:33,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:33,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:33,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:33,061 INFO L87 Difference]: Start difference. First operand 120 states and 329 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:33,118 INFO L93 Difference]: Finished difference Result 219 states and 478 transitions. [2021-06-05 04:08:33,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:08:33,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:33,127 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:08:33,127 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 04:08:33,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:08:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 04:08:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 114. [2021-06-05 04:08:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-05 04:08:33,131 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-05 04:08:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:33,131 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-05 04:08:33,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-05 04:08:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:33,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:33,132 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:33,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:33,332 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:33,333 INFO L82 PathProgramCache]: Analyzing trace with hash -209496772, now seen corresponding path program 44 times [2021-06-05 04:08:33,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:33,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897077671] [2021-06-05 04:08:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:33,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:33,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897077671] [2021-06-05 04:08:33,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897077671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:33,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568657572] [2021-06-05 04:08:33,404 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 04:08:33,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:33,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:33,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:33,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:33,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:33,608 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:33,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:33,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:33,663 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:33,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:33,756 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:33,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:33,757 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:33,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568657572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:33,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:33,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:33,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747198262] [2021-06-05 04:08:33,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:33,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:33,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:33,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:33,785 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:34,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:34,220 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2021-06-05 04:08:34,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:08:34,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:34,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:34,220 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:08:34,221 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:08:34,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:08:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:08:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2021-06-05 04:08:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-05 04:08:34,223 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-05 04:08:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:34,223 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-05 04:08:34,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-05 04:08:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:34,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:34,224 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:34,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:34,446 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:34,446 INFO L82 PathProgramCache]: Analyzing trace with hash -620186411, now seen corresponding path program 45 times [2021-06-05 04:08:34,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:34,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665450070] [2021-06-05 04:08:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:34,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:34,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665450070] [2021-06-05 04:08:34,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665450070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:34,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678535446] [2021-06-05 04:08:34,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:34,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:08:34,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:34,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:08:34,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:34,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678535446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:34,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:34,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:08:34,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965839052] [2021-06-05 04:08:34,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:34,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:34,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:34,527 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:34,611 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2021-06-05 04:08:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:08:34,612 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:34,613 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:08:34,613 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:08:34,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:08:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2021-06-05 04:08:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-05 04:08:34,616 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-05 04:08:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:34,616 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-05 04:08:34,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:34,616 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-05 04:08:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:34,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:34,616 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:34,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable819 [2021-06-05 04:08:34,836 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:34,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:34,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1261575944, now seen corresponding path program 46 times [2021-06-05 04:08:34,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:34,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115294612] [2021-06-05 04:08:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:34,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:34,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115294612] [2021-06-05 04:08:34,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115294612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:34,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547302013] [2021-06-05 04:08:34,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:34,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:34,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:34,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 04:08:34,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:35,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:35,080 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:08:35,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:35,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:35,133 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:08:35,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:08:35,214 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:08:35,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:08:35,215 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 04:08:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:35,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547302013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:35,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:35,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:35,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83606464] [2021-06-05 04:08:35,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:35,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:35,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:35,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:35,240 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:35,681 INFO L93 Difference]: Finished difference Result 162 states and 391 transitions. [2021-06-05 04:08:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:08:35,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:35,682 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:08:35,682 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 04:08:35,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:08:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 04:08:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-06-05 04:08:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.7217391304347824) internal successors, (313), 115 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 313 transitions. [2021-06-05 04:08:35,686 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 313 transitions. Word has length 15 [2021-06-05 04:08:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:35,686 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 313 transitions. [2021-06-05 04:08:35,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 313 transitions. [2021-06-05 04:08:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:08:35,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:35,686 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:35,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-06-05 04:08:35,905 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:35,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1126532677, now seen corresponding path program 47 times [2021-06-05 04:08:35,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:35,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838627450] [2021-06-05 04:08:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:35,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:35,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838627450] [2021-06-05 04:08:35,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838627450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:35,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372126724] [2021-06-05 04:08:35,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:35,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:08:35,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:08:35,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:36,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372126724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:36,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:36,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:08:36,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59581518] [2021-06-05 04:08:36,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:36,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:36,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:36,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:36,004 INFO L87 Difference]: Start difference. First operand 116 states and 313 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:36,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:36,088 INFO L93 Difference]: Finished difference Result 188 states and 448 transitions. [2021-06-05 04:08:36,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:36,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:08:36,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:36,089 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:08:36,089 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:08:36,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:08:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2021-06-05 04:08:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.7355371900826446) internal successors, (331), 121 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 331 transitions. [2021-06-05 04:08:36,092 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 331 transitions. Word has length 15 [2021-06-05 04:08:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:36,092 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 331 transitions. [2021-06-05 04:08:36,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 331 transitions. [2021-06-05 04:08:36,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:36,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:36,092 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:36,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:36,305 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash -43188332, now seen corresponding path program 48 times [2021-06-05 04:08:36,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:36,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254169298] [2021-06-05 04:08:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:36,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:36,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254169298] [2021-06-05 04:08:36,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254169298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:36,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905904957] [2021-06-05 04:08:36,379 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 04:08:36,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:08:36,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:36,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:08:36,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:36,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:36,567 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:08:36,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:36,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:36,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:36,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:08:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:36,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905904957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:36,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:36,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:36,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489534999] [2021-06-05 04:08:36,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:36,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:36,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:36,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:36,621 INFO L87 Difference]: Start difference. First operand 122 states and 331 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:36,844 INFO L93 Difference]: Finished difference Result 161 states and 428 transitions. [2021-06-05 04:08:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:36,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:36,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:36,845 INFO L225 Difference]: With dead ends: 161 [2021-06-05 04:08:36,845 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:08:36,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:08:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-06-05 04:08:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-06-05 04:08:36,851 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-06-05 04:08:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:36,851 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-06-05 04:08:36,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-06-05 04:08:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:36,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:36,852 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:37,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:37,060 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash 343012782, now seen corresponding path program 49 times [2021-06-05 04:08:37,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:37,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016806155] [2021-06-05 04:08:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:37,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:37,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016806155] [2021-06-05 04:08:37,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016806155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:37,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336441108] [2021-06-05 04:08:37,124 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 04:08:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:37,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:08:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:37,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:37,317 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:08:37,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:37,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:37,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:37,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:08:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:37,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336441108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:37,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:37,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:37,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987140715] [2021-06-05 04:08:37,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:37,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:37,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:37,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:37,383 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:37,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:37,658 INFO L93 Difference]: Finished difference Result 174 states and 444 transitions. [2021-06-05 04:08:37,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:08:37,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:37,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:37,659 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:08:37,660 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 04:08:37,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:08:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 04:08:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-06-05 04:08:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-06-05 04:08:37,662 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-06-05 04:08:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:37,662 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-06-05 04:08:37,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-06-05 04:08:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:37,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:37,663 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:37,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:37,877 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:37,877 INFO L82 PathProgramCache]: Analyzing trace with hash -318251001, now seen corresponding path program 50 times [2021-06-05 04:08:37,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:37,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304348662] [2021-06-05 04:08:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:37,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:37,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304348662] [2021-06-05 04:08:37,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304348662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:37,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966761093] [2021-06-05 04:08:37,904 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 04:08:37,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:37,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:37,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:37,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:37,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966761093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:37,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:37,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:08:37,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165500891] [2021-06-05 04:08:37,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:37,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:37,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:37,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:37,955 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:37,993 INFO L93 Difference]: Finished difference Result 261 states and 586 transitions. [2021-06-05 04:08:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:08:37,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:37,994 INFO L225 Difference]: With dead ends: 261 [2021-06-05 04:08:37,994 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 04:08:37,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 04:08:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 136. [2021-06-05 04:08:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-05 04:08:37,997 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-05 04:08:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:37,997 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-05 04:08:37,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:37,998 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-05 04:08:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:37,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:37,998 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:38,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable906 [2021-06-05 04:08:38,213 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:38,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:38,213 INFO L82 PathProgramCache]: Analyzing trace with hash -713859132, now seen corresponding path program 51 times [2021-06-05 04:08:38,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:38,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949551810] [2021-06-05 04:08:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:38,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:38,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949551810] [2021-06-05 04:08:38,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949551810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:38,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827451527] [2021-06-05 04:08:38,285 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 04:08:38,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:08:38,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:38,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:08:38,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:38,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:38,505 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:08:38,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:38,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:38,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:38,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:08:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:38,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827451527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:38,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:38,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:38,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983779993] [2021-06-05 04:08:38,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:38,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:38,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:38,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:38,561 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:38,750 INFO L93 Difference]: Finished difference Result 173 states and 438 transitions. [2021-06-05 04:08:38,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:38,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:38,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:38,751 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:08:38,751 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 04:08:38,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 04:08:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2021-06-05 04:08:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-05 04:08:38,754 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-05 04:08:38,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:38,754 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-05 04:08:38,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:38,754 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-05 04:08:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:38,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:38,755 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:38,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:38,977 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:38,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:38,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1841255225, now seen corresponding path program 52 times [2021-06-05 04:08:38,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:38,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219773677] [2021-06-05 04:08:38,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:39,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:39,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219773677] [2021-06-05 04:08:39,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219773677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:39,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855020954] [2021-06-05 04:08:39,037 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 04:08:39,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:39,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:39,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:39,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:39,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855020954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:39,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:39,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:08:39,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549322985] [2021-06-05 04:08:39,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:39,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:39,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:39,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:39,087 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:39,140 INFO L93 Difference]: Finished difference Result 272 states and 604 transitions. [2021-06-05 04:08:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:08:39,141 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:39,141 INFO L225 Difference]: With dead ends: 272 [2021-06-05 04:08:39,141 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 04:08:39,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:08:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 04:08:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 136. [2021-06-05 04:08:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-05 04:08:39,145 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-05 04:08:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:39,145 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-05 04:08:39,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-05 04:08:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:39,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:39,146 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:39,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-06-05 04:08:39,361 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:39,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1220205398, now seen corresponding path program 53 times [2021-06-05 04:08:39,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:39,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590895147] [2021-06-05 04:08:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:39,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:39,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590895147] [2021-06-05 04:08:39,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590895147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:39,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134144284] [2021-06-05 04:08:39,435 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 04:08:39,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:08:39,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:39,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:08:39,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:39,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:39,637 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:08:39,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:39,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:39,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:39,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:08:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:39,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134144284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:39,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:39,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:39,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255161512] [2021-06-05 04:08:39,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:39,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:39,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:39,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:39,685 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:39,858 INFO L93 Difference]: Finished difference Result 152 states and 404 transitions. [2021-06-05 04:08:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:39,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:39,859 INFO L225 Difference]: With dead ends: 152 [2021-06-05 04:08:39,859 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:08:39,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:08:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-06-05 04:08:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.774436090225564) internal successors, (369), 133 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 369 transitions. [2021-06-05 04:08:39,867 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 369 transitions. Word has length 16 [2021-06-05 04:08:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:39,867 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 369 transitions. [2021-06-05 04:08:39,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 369 transitions. [2021-06-05 04:08:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:39,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:39,867 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:40,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:40,073 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:40,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1947365805, now seen corresponding path program 54 times [2021-06-05 04:08:40,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:40,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682419192] [2021-06-05 04:08:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:40,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:40,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682419192] [2021-06-05 04:08:40,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682419192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:40,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466846274] [2021-06-05 04:08:40,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:40,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:08:40,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:40,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:40,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:40,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466846274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:40,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:40,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:08:40,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92467117] [2021-06-05 04:08:40,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:40,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:40,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:40,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:40,167 INFO L87 Difference]: Start difference. First operand 134 states and 369 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:40,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:40,219 INFO L93 Difference]: Finished difference Result 271 states and 600 transitions. [2021-06-05 04:08:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:08:40,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:40,234 INFO L225 Difference]: With dead ends: 271 [2021-06-05 04:08:40,234 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 04:08:40,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:08:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 04:08:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 137. [2021-06-05 04:08:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.8088235294117645) internal successors, (382), 136 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 382 transitions. [2021-06-05 04:08:40,237 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 382 transitions. Word has length 16 [2021-06-05 04:08:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:40,238 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 382 transitions. [2021-06-05 04:08:40,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 382 transitions. [2021-06-05 04:08:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:40,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:40,238 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:40,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-05 04:08:40,453 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:40,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1809745913, now seen corresponding path program 55 times [2021-06-05 04:08:40,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:40,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466953887] [2021-06-05 04:08:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:40,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:40,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466953887] [2021-06-05 04:08:40,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466953887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:40,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407638456] [2021-06-05 04:08:40,489 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) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:40,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:40,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407638456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:40,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:40,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:08:40,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959056116] [2021-06-05 04:08:40,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:40,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:40,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:40,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:40,567 INFO L87 Difference]: Start difference. First operand 137 states and 382 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:40,676 INFO L93 Difference]: Finished difference Result 294 states and 636 transitions. [2021-06-05 04:08:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:40,677 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:40,678 INFO L225 Difference]: With dead ends: 294 [2021-06-05 04:08:40,678 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 04:08:40,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 04:08:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 138. [2021-06-05 04:08:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.795620437956204) internal successors, (383), 137 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 383 transitions. [2021-06-05 04:08:40,681 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 383 transitions. Word has length 16 [2021-06-05 04:08:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:40,682 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 383 transitions. [2021-06-05 04:08:40,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 383 transitions. [2021-06-05 04:08:40,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:40,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:40,682 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:40,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable955,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:40,905 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:40,905 INFO L82 PathProgramCache]: Analyzing trace with hash 262929540, now seen corresponding path program 56 times [2021-06-05 04:08:40,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:40,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085337254] [2021-06-05 04:08:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:40,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:40,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085337254] [2021-06-05 04:08:40,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085337254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:40,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470631973] [2021-06-05 04:08:40,976 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 04:08:41,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:41,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:41,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:08:41,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:41,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:41,193 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:08:41,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:41,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:41,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:41,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:08:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:41,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470631973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:41,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:41,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:41,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776025299] [2021-06-05 04:08:41,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:41,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:41,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:41,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:41,250 INFO L87 Difference]: Start difference. First operand 138 states and 383 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:41,446 INFO L93 Difference]: Finished difference Result 156 states and 422 transitions. [2021-06-05 04:08:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:41,446 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:08:41,447 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:08:41,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:08:41,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-06-05 04:08:41,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8043478260869565) internal successors, (387), 138 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 387 transitions. [2021-06-05 04:08:41,449 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 387 transitions. Word has length 16 [2021-06-05 04:08:41,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:41,449 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 387 transitions. [2021-06-05 04:08:41,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 387 transitions. [2021-06-05 04:08:41,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:41,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:41,450 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:41,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:41,665 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:41,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1196393249, now seen corresponding path program 57 times [2021-06-05 04:08:41,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:41,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003113066] [2021-06-05 04:08:41,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:41,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:41,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003113066] [2021-06-05 04:08:41,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003113066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:41,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163821638] [2021-06-05 04:08:41,695 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 04:08:41,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:08:41,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:41,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:41,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:08:41,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163821638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:41,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:41,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 04:08:41,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734817387] [2021-06-05 04:08:41,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:08:41,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:41,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:08:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:08:41,743 INFO L87 Difference]: Start difference. First operand 139 states and 387 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:41,781 INFO L93 Difference]: Finished difference Result 241 states and 571 transitions. [2021-06-05 04:08:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:08:41,781 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:41,782 INFO L225 Difference]: With dead ends: 241 [2021-06-05 04:08:41,783 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 04:08:41,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 04:08:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 156. [2021-06-05 04:08:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8516129032258064) internal successors, (442), 155 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 442 transitions. [2021-06-05 04:08:41,786 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 442 transitions. Word has length 16 [2021-06-05 04:08:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:41,786 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 442 transitions. [2021-06-05 04:08:41,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 442 transitions. [2021-06-05 04:08:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:41,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:41,787 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:41,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable979 [2021-06-05 04:08:41,997 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:41,997 INFO L82 PathProgramCache]: Analyzing trace with hash -864466553, now seen corresponding path program 58 times [2021-06-05 04:08:41,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:41,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407121951] [2021-06-05 04:08:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:42,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:42,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407121951] [2021-06-05 04:08:42,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407121951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:42,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014667837] [2021-06-05 04:08:42,030 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 04:08:42,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:42,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:42,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:42,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:42,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014667837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:42,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:42,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:08:42,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263099032] [2021-06-05 04:08:42,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:42,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:42,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:42,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:42,075 INFO L87 Difference]: Start difference. First operand 156 states and 442 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:42,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:42,123 INFO L93 Difference]: Finished difference Result 263 states and 603 transitions. [2021-06-05 04:08:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:08:42,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:42,124 INFO L225 Difference]: With dead ends: 263 [2021-06-05 04:08:42,124 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 04:08:42,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:08:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 04:08:42,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 145. [2021-06-05 04:08:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8125) internal successors, (405), 144 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 405 transitions. [2021-06-05 04:08:42,127 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 405 transitions. Word has length 16 [2021-06-05 04:08:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:42,127 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 405 transitions. [2021-06-05 04:08:42,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 405 transitions. [2021-06-05 04:08:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:42,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:42,128 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:42,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable980 [2021-06-05 04:08:42,341 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash -326610975, now seen corresponding path program 59 times [2021-06-05 04:08:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:42,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154221574] [2021-06-05 04:08:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:42,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:42,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154221574] [2021-06-05 04:08:42,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154221574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:42,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49131974] [2021-06-05 04:08:42,376 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 04:08:42,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:08:42,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:42,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:42,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:42,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49131974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:42,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:42,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:08:42,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96614082] [2021-06-05 04:08:42,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:42,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:42,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:42,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:42,428 INFO L87 Difference]: Start difference. First operand 145 states and 405 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:42,520 INFO L93 Difference]: Finished difference Result 279 states and 612 transitions. [2021-06-05 04:08:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:08:42,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:42,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:42,522 INFO L225 Difference]: With dead ends: 279 [2021-06-05 04:08:42,522 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 04:08:42,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 04:08:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 139. [2021-06-05 04:08:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.7971014492753623) internal successors, (386), 138 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 386 transitions. [2021-06-05 04:08:42,525 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 386 transitions. Word has length 16 [2021-06-05 04:08:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:42,525 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 386 transitions. [2021-06-05 04:08:42,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 386 transitions. [2021-06-05 04:08:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:42,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:42,526 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:42,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable981,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:42,741 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:42,741 INFO L82 PathProgramCache]: Analyzing trace with hash -832957241, now seen corresponding path program 60 times [2021-06-05 04:08:42,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:42,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62966265] [2021-06-05 04:08:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:42,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:42,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62966265] [2021-06-05 04:08:42,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62966265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:42,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164129287] [2021-06-05 04:08:42,773 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 04:08:42,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:08:42,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:42,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:42,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:42,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164129287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:42,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:42,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:08:42,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306438746] [2021-06-05 04:08:42,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:42,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:42,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:42,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:42,827 INFO L87 Difference]: Start difference. First operand 139 states and 386 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:42,941 INFO L93 Difference]: Finished difference Result 234 states and 545 transitions. [2021-06-05 04:08:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:42,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:42,942 INFO L225 Difference]: With dead ends: 234 [2021-06-05 04:08:42,942 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 04:08:42,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:08:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 04:08:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 137. [2021-06-05 04:08:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.7941176470588234) internal successors, (380), 136 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 380 transitions. [2021-06-05 04:08:42,944 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 380 transitions. Word has length 16 [2021-06-05 04:08:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:42,944 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 380 transitions. [2021-06-05 04:08:42,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 380 transitions. [2021-06-05 04:08:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:42,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:42,945 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:43,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-05 04:08:43,161 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1004527638, now seen corresponding path program 61 times [2021-06-05 04:08:43,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:43,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996572957] [2021-06-05 04:08:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:43,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:43,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996572957] [2021-06-05 04:08:43,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996572957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:43,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988632524] [2021-06-05 04:08:43,222 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 04:08:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:43,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:08:43,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:43,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:43,405 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:08:43,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:43,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:43,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:43,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:08:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:43,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988632524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:43,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:43,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:43,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588595642] [2021-06-05 04:08:43,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:43,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:43,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:43,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:43,501 INFO L87 Difference]: Start difference. First operand 137 states and 380 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:43,717 INFO L93 Difference]: Finished difference Result 184 states and 502 transitions. [2021-06-05 04:08:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:43,717 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:43,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:43,718 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:08:43,718 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:08:43,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:43,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:08:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-06-05 04:08:43,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-06-05 04:08:43,720 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-06-05 04:08:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:43,720 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-06-05 04:08:43,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-06-05 04:08:43,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:43,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:43,720 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:43,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 04:08:43,921 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:43,921 INFO L82 PathProgramCache]: Analyzing trace with hash 590199854, now seen corresponding path program 62 times [2021-06-05 04:08:43,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:43,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244678544] [2021-06-05 04:08:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:43,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:43,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244678544] [2021-06-05 04:08:43,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244678544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:43,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363305370] [2021-06-05 04:08:43,986 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 04:08:44,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:44,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:44,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:08:44,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:44,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:44,172 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:08:44,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:44,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:44,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:44,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:08:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:44,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363305370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:44,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:44,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:08:44,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815737823] [2021-06-05 04:08:44,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:08:44,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:44,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:08:44,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:44,248 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:44,561 INFO L93 Difference]: Finished difference Result 197 states and 515 transitions. [2021-06-05 04:08:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:08:44,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:44,562 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:08:44,562 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 04:08:44,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:08:44,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 04:08:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-06-05 04:08:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-06-05 04:08:44,564 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-06-05 04:08:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:44,564 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-06-05 04:08:44,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-06-05 04:08:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:44,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:44,565 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:44,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1018 [2021-06-05 04:08:44,765 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:44,766 INFO L82 PathProgramCache]: Analyzing trace with hash -71063929, now seen corresponding path program 63 times [2021-06-05 04:08:44,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:44,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75473563] [2021-06-05 04:08:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:44,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:44,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75473563] [2021-06-05 04:08:44,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75473563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:44,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453054132] [2021-06-05 04:08:44,799 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 04:08:44,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:08:44,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:44,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:44,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:44,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453054132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:44,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:44,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:08:44,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638725583] [2021-06-05 04:08:44,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:44,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:44,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:44,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:44,857 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:44,898 INFO L93 Difference]: Finished difference Result 269 states and 624 transitions. [2021-06-05 04:08:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:08:44,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:44,899 INFO L225 Difference]: With dead ends: 269 [2021-06-05 04:08:44,899 INFO L226 Difference]: Without dead ends: 269 [2021-06-05 04:08:44,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-05 04:08:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 158. [2021-06-05 04:08:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8980891719745223) internal successors, (455), 157 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 455 transitions. [2021-06-05 04:08:44,902 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 455 transitions. Word has length 16 [2021-06-05 04:08:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:44,902 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 455 transitions. [2021-06-05 04:08:44,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 455 transitions. [2021-06-05 04:08:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:44,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:44,903 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:45,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:45,117 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:45,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:45,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2131923731, now seen corresponding path program 64 times [2021-06-05 04:08:45,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:45,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731888188] [2021-06-05 04:08:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:45,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:45,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731888188] [2021-06-05 04:08:45,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731888188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:45,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489399277] [2021-06-05 04:08:45,150 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 04:08:45,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:45,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:45,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:45,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489399277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:45,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:45,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:08:45,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529158208] [2021-06-05 04:08:45,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:45,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:45,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:45,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:45,196 INFO L87 Difference]: Start difference. First operand 158 states and 455 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:45,240 INFO L93 Difference]: Finished difference Result 244 states and 614 transitions. [2021-06-05 04:08:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:08:45,240 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:45,241 INFO L225 Difference]: With dead ends: 244 [2021-06-05 04:08:45,241 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 04:08:45,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 04:08:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-06-05 04:08:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.9195402298850577) internal successors, (508), 174 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 508 transitions. [2021-06-05 04:08:45,244 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 508 transitions. Word has length 16 [2021-06-05 04:08:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:45,244 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 508 transitions. [2021-06-05 04:08:45,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 508 transitions. [2021-06-05 04:08:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:45,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:45,245 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:45,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1051,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:45,463 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1594068153, now seen corresponding path program 65 times [2021-06-05 04:08:45,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:45,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364458564] [2021-06-05 04:08:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:45,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:45,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364458564] [2021-06-05 04:08:45,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364458564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:45,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785698555] [2021-06-05 04:08:45,495 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 04:08:45,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:08:45,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:45,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:45,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785698555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:45,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:45,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:08:45,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325192447] [2021-06-05 04:08:45,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:45,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:45,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:45,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:45,550 INFO L87 Difference]: Start difference. First operand 175 states and 508 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:45,628 INFO L93 Difference]: Finished difference Result 268 states and 649 transitions. [2021-06-05 04:08:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:08:45,628 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:45,629 INFO L225 Difference]: With dead ends: 268 [2021-06-05 04:08:45,629 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 04:08:45,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 04:08:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 172. [2021-06-05 04:08:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 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 04:08:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-06-05 04:08:45,632 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-06-05 04:08:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:45,633 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-06-05 04:08:45,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-06-05 04:08:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:45,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:45,633 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:45,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:45,856 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2100414419, now seen corresponding path program 66 times [2021-06-05 04:08:45,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:45,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108578005] [2021-06-05 04:08:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:45,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:45,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108578005] [2021-06-05 04:08:45,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108578005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:45,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965592958] [2021-06-05 04:08:45,894 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 04:08:45,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:08:45,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:45,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:45,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965592958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:45,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:45,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:08:45,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83814842] [2021-06-05 04:08:45,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:45,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:45,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:45,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:45,951 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:46,043 INFO L93 Difference]: Finished difference Result 237 states and 603 transitions. [2021-06-05 04:08:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:46,044 INFO L225 Difference]: With dead ends: 237 [2021-06-05 04:08:46,044 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 04:08:46,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 04:08:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 172. [2021-06-05 04:08:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 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 04:08:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-06-05 04:08:46,047 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-06-05 04:08:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:46,047 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-06-05 04:08:46,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-06-05 04:08:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:08:46,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:46,048 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:46,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:46,257 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:46,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:46,257 INFO L82 PathProgramCache]: Analyzing trace with hash -617279481, now seen corresponding path program 67 times [2021-06-05 04:08:46,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:46,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39310312] [2021-06-05 04:08:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:46,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39310312] [2021-06-05 04:08:46,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39310312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745156163] [2021-06-05 04:08:46,297 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 04:08:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:46,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:08:46,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:46,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745156163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:46,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:46,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:08:46,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144384660] [2021-06-05 04:08:46,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:46,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:46,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:46,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:46,371 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:46,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:46,471 INFO L93 Difference]: Finished difference Result 261 states and 681 transitions. [2021-06-05 04:08:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:46,471 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:08:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:46,472 INFO L225 Difference]: With dead ends: 261 [2021-06-05 04:08:46,472 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 04:08:46,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 04:08:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2021-06-05 04:08:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-06-05 04:08:46,476 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 16 [2021-06-05 04:08:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:46,476 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-06-05 04:08:46,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-06-05 04:08:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:46,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:46,476 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:46,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:46,681 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash 467715592, now seen corresponding path program 68 times [2021-06-05 04:08:46,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:46,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235077972] [2021-06-05 04:08:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:46,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:46,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235077972] [2021-06-05 04:08:46,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235077972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:46,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096468675] [2021-06-05 04:08:46,733 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 04:08:46,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:46,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:46,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:46,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:46,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096468675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:46,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:46,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:08:46,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191887730] [2021-06-05 04:08:46,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:08:46,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:46,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:08:46,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:46,814 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:46,896 INFO L93 Difference]: Finished difference Result 282 states and 694 transitions. [2021-06-05 04:08:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:08:46,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:46,897 INFO L225 Difference]: With dead ends: 282 [2021-06-05 04:08:46,897 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 04:08:46,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 04:08:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 190. [2021-06-05 04:08:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-06-05 04:08:46,901 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-06-05 04:08:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:46,901 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-06-05 04:08:46,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-06-05 04:08:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:46,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:46,902 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:47,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1055 [2021-06-05 04:08:47,105 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1312212869, now seen corresponding path program 69 times [2021-06-05 04:08:47,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:47,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437395672] [2021-06-05 04:08:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:47,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:47,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437395672] [2021-06-05 04:08:47,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437395672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:47,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594732920] [2021-06-05 04:08:47,147 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 04:08:47,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:08:47,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:47,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:47,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:47,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594732920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:47,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:47,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:08:47,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566427088] [2021-06-05 04:08:47,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:08:47,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:47,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:08:47,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:47,218 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:47,344 INFO L93 Difference]: Finished difference Result 315 states and 767 transitions. [2021-06-05 04:08:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:08:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:47,345 INFO L225 Difference]: With dead ends: 315 [2021-06-05 04:08:47,345 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 04:08:47,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:08:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 04:08:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 196. [2021-06-05 04:08:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.933333333333333) internal successors, (572), 195 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 572 transitions. [2021-06-05 04:08:47,351 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 572 transitions. Word has length 17 [2021-06-05 04:08:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:47,351 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 572 transitions. [2021-06-05 04:08:47,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:47,351 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 572 transitions. [2021-06-05 04:08:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:47,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:47,352 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:47,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-06-05 04:08:47,569 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:47,569 INFO L82 PathProgramCache]: Analyzing trace with hash 853916706, now seen corresponding path program 70 times [2021-06-05 04:08:47,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:47,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222534620] [2021-06-05 04:08:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:47,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:47,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222534620] [2021-06-05 04:08:47,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222534620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:47,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816871154] [2021-06-05 04:08:47,608 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 04:08:47,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:47,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:47,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:47,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816871154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:47,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:47,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:08:47,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946263000] [2021-06-05 04:08:47,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:47,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:47,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:47,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:47,658 INFO L87 Difference]: Start difference. First operand 196 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:47,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:47,745 INFO L93 Difference]: Finished difference Result 233 states and 626 transitions. [2021-06-05 04:08:47,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:47,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:47,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:47,746 INFO L225 Difference]: With dead ends: 233 [2021-06-05 04:08:47,746 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 04:08:47,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 04:08:47,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 198. [2021-06-05 04:08:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9035532994923856) internal successors, (572), 197 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:47,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 572 transitions. [2021-06-05 04:08:47,750 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 572 transitions. Word has length 17 [2021-06-05 04:08:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:47,750 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 572 transitions. [2021-06-05 04:08:47,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 572 transitions. [2021-06-05 04:08:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:47,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:47,751 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:47,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-06-05 04:08:47,973 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash 192652923, now seen corresponding path program 71 times [2021-06-05 04:08:47,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:47,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474459663] [2021-06-05 04:08:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:48,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:48,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474459663] [2021-06-05 04:08:48,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474459663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:48,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138813401] [2021-06-05 04:08:48,006 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 04:08:48,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:08:48,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:48,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:48,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:48,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138813401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:48,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:48,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:08:48,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675545389] [2021-06-05 04:08:48,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:48,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:48,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:48,061 INFO L87 Difference]: Start difference. First operand 198 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:48,106 INFO L93 Difference]: Finished difference Result 310 states and 743 transitions. [2021-06-05 04:08:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:08:48,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:48,107 INFO L225 Difference]: With dead ends: 310 [2021-06-05 04:08:48,107 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 04:08:48,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 04:08:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 188. [2021-06-05 04:08:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.855614973262032) internal successors, (534), 187 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 534 transitions. [2021-06-05 04:08:48,110 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 534 transitions. Word has length 17 [2021-06-05 04:08:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:48,110 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 534 transitions. [2021-06-05 04:08:48,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 534 transitions. [2021-06-05 04:08:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:48,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:48,111 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:48,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1058,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:48,329 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2007436600, now seen corresponding path program 72 times [2021-06-05 04:08:48,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:48,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469098502] [2021-06-05 04:08:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:48,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:48,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469098502] [2021-06-05 04:08:48,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469098502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:48,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273853111] [2021-06-05 04:08:48,364 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 04:08:48,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:08:48,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:48,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:48,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:48,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273853111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:48,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:48,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:08:48,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305675253] [2021-06-05 04:08:48,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:48,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:48,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:48,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:48,417 INFO L87 Difference]: Start difference. First operand 188 states and 534 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:48,489 INFO L93 Difference]: Finished difference Result 256 states and 671 transitions. [2021-06-05 04:08:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:48,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:48,490 INFO L225 Difference]: With dead ends: 256 [2021-06-05 04:08:48,490 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 04:08:48,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 04:08:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-06-05 04:08:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8469387755102042) internal successors, (558), 196 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 558 transitions. [2021-06-05 04:08:48,493 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 558 transitions. Word has length 17 [2021-06-05 04:08:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:48,493 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 558 transitions. [2021-06-05 04:08:48,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 558 transitions. [2021-06-05 04:08:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:48,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:48,493 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:48,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-06-05 04:08:48,694 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:48,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:48,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1330351301, now seen corresponding path program 73 times [2021-06-05 04:08:48,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:48,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026080713] [2021-06-05 04:08:48,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:48,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:48,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026080713] [2021-06-05 04:08:48,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026080713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:48,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083013383] [2021-06-05 04:08:48,740 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 04:08:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:48,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:48,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083013383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:48,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:48,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:08:48,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491625243] [2021-06-05 04:08:48,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:48,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:48,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:48,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:48,805 INFO L87 Difference]: Start difference. First operand 197 states and 558 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:48,862 INFO L93 Difference]: Finished difference Result 333 states and 786 transitions. [2021-06-05 04:08:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:08:48,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:48,864 INFO L225 Difference]: With dead ends: 333 [2021-06-05 04:08:48,864 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 04:08:48,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:08:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 04:08:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 199. [2021-06-05 04:08:48,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.8535353535353534) internal successors, (565), 198 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 565 transitions. [2021-06-05 04:08:48,868 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 565 transitions. Word has length 17 [2021-06-05 04:08:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:48,868 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 565 transitions. [2021-06-05 04:08:48,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:48,869 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 565 transitions. [2021-06-05 04:08:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:48,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:48,869 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:49,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1060,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:49,086 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash -888152350, now seen corresponding path program 74 times [2021-06-05 04:08:49,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:49,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357603008] [2021-06-05 04:08:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:49,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:49,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357603008] [2021-06-05 04:08:49,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357603008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:49,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919197500] [2021-06-05 04:08:49,128 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 04:08:49,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:49,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:49,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:49,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:49,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919197500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:49,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:49,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064998291] [2021-06-05 04:08:49,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:49,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:49,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:49,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:49,185 INFO L87 Difference]: Start difference. First operand 199 states and 565 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:49,265 INFO L93 Difference]: Finished difference Result 260 states and 680 transitions. [2021-06-05 04:08:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:49,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:49,267 INFO L225 Difference]: With dead ends: 260 [2021-06-05 04:08:49,267 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 04:08:49,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 04:08:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 201. [2021-06-05 04:08:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-06-05 04:08:49,271 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-06-05 04:08:49,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:49,271 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-06-05 04:08:49,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-06-05 04:08:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:49,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:49,272 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:49,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:49,486 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:49,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:49,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1298841989, now seen corresponding path program 75 times [2021-06-05 04:08:49,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:49,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137333535] [2021-06-05 04:08:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:49,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:49,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137333535] [2021-06-05 04:08:49,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137333535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:49,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179661049] [2021-06-05 04:08:49,519 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 04:08:49,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:08:49,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:49,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:49,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:49,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179661049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:49,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:49,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:49,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891201032] [2021-06-05 04:08:49,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:49,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:49,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:49,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:49,571 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:49,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:49,649 INFO L93 Difference]: Finished difference Result 348 states and 819 transitions. [2021-06-05 04:08:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:49,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:49,650 INFO L225 Difference]: With dead ends: 348 [2021-06-05 04:08:49,650 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 04:08:49,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:49,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 04:08:49,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 201. [2021-06-05 04:08:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-06-05 04:08:49,653 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-06-05 04:08:49,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:49,653 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-06-05 04:08:49,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-06-05 04:08:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:49,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:49,654 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:49,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:49,854 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:49,855 INFO L82 PathProgramCache]: Analyzing trace with hash 773833464, now seen corresponding path program 76 times [2021-06-05 04:08:49,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:49,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89454409] [2021-06-05 04:08:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:49,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:49,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89454409] [2021-06-05 04:08:49,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89454409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:49,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701448957] [2021-06-05 04:08:49,884 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 04:08:49,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:49,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:49,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:49,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:08:49,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701448957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:49,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:49,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 04:08:49,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294145463] [2021-06-05 04:08:49,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:08:49,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:08:49,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:08:49,956 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:49,989 INFO L93 Difference]: Finished difference Result 328 states and 825 transitions. [2021-06-05 04:08:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:08:49,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:49,990 INFO L225 Difference]: With dead ends: 328 [2021-06-05 04:08:49,990 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 04:08:49,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 04:08:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 216. [2021-06-05 04:08:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.902325581395349) internal successors, (624), 215 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 624 transitions. [2021-06-05 04:08:49,996 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 624 transitions. Word has length 17 [2021-06-05 04:08:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:49,996 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 624 transitions. [2021-06-05 04:08:49,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 624 transitions. [2021-06-05 04:08:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:49,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:49,999 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:50,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1063 [2021-06-05 04:08:50,213 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash 854963749, now seen corresponding path program 77 times [2021-06-05 04:08:50,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:50,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522683760] [2021-06-05 04:08:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:50,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:50,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522683760] [2021-06-05 04:08:50,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522683760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:50,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109019106] [2021-06-05 04:08:50,241 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 04:08:50,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:08:50,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:50,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:50,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:08:50,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109019106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:50,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:50,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 04:08:50,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242286843] [2021-06-05 04:08:50,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:08:50,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:50,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:08:50,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:08:50,288 INFO L87 Difference]: Start difference. First operand 216 states and 624 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:50,352 INFO L93 Difference]: Finished difference Result 306 states and 770 transitions. [2021-06-05 04:08:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:08:50,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:50,353 INFO L225 Difference]: With dead ends: 306 [2021-06-05 04:08:50,353 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 04:08:50,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:08:50,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 04:08:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 226. [2021-06-05 04:08:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.92) internal successors, (657), 225 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 657 transitions. [2021-06-05 04:08:50,356 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 657 transitions. Word has length 17 [2021-06-05 04:08:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:50,356 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 657 transitions. [2021-06-05 04:08:50,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 657 transitions. [2021-06-05 04:08:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:50,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:50,357 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:50,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:50,557 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:50,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:50,558 INFO L82 PathProgramCache]: Analyzing trace with hash -353562629, now seen corresponding path program 78 times [2021-06-05 04:08:50,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:50,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878364148] [2021-06-05 04:08:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:50,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:50,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878364148] [2021-06-05 04:08:50,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878364148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:50,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263977768] [2021-06-05 04:08:50,586 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 04:08:50,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:08:50,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:50,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:50,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263977768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:50,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:50,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:08:50,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96556605] [2021-06-05 04:08:50,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:50,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:50,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:50,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:50,635 INFO L87 Difference]: Start difference. First operand 226 states and 657 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:50,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:50,685 INFO L93 Difference]: Finished difference Result 312 states and 782 transitions. [2021-06-05 04:08:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:08:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:50,686 INFO L225 Difference]: With dead ends: 312 [2021-06-05 04:08:50,686 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 04:08:50,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:08:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 04:08:50,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 225. [2021-06-05 04:08:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.9151785714285716) internal successors, (653), 224 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 653 transitions. [2021-06-05 04:08:50,689 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 653 transitions. Word has length 17 [2021-06-05 04:08:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:50,689 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 653 transitions. [2021-06-05 04:08:50,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 653 transitions. [2021-06-05 04:08:50,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:50,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:50,690 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:50,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:50,890 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:50,890 INFO L82 PathProgramCache]: Analyzing trace with hash 594982588, now seen corresponding path program 79 times [2021-06-05 04:08:50,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:50,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924519320] [2021-06-05 04:08:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:50,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:50,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924519320] [2021-06-05 04:08:50,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924519320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:50,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78764469] [2021-06-05 04:08:50,929 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 04:08:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:50,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:50,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:50,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78764469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:50,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:50,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:50,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482527098] [2021-06-05 04:08:50,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:50,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:50,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:50,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:50,974 INFO L87 Difference]: Start difference. First operand 225 states and 653 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:51,056 INFO L93 Difference]: Finished difference Result 311 states and 814 transitions. [2021-06-05 04:08:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:51,056 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:51,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:51,057 INFO L225 Difference]: With dead ends: 311 [2021-06-05 04:08:51,057 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 04:08:51,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:51,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 04:08:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 227. [2021-06-05 04:08:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-06-05 04:08:51,061 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-06-05 04:08:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:51,061 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-06-05 04:08:51,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-06-05 04:08:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:51,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:51,062 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:51,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-06-05 04:08:51,277 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:51,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash 184292949, now seen corresponding path program 80 times [2021-06-05 04:08:51,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:51,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997180474] [2021-06-05 04:08:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:51,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:51,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997180474] [2021-06-05 04:08:51,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997180474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:51,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877650047] [2021-06-05 04:08:51,313 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) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:51,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:51,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:51,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:51,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:51,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877650047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:51,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:51,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:51,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438109993] [2021-06-05 04:08:51,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:51,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:51,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:51,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:51,373 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:51,465 INFO L93 Difference]: Finished difference Result 338 states and 826 transitions. [2021-06-05 04:08:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:08:51,466 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:51,467 INFO L225 Difference]: With dead ends: 338 [2021-06-05 04:08:51,467 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 04:08:51,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 04:08:51,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 227. [2021-06-05 04:08:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-06-05 04:08:51,471 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-06-05 04:08:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:51,471 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-06-05 04:08:51,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-06-05 04:08:51,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:51,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:51,472 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:51,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-06-05 04:08:51,693 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:51,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:51,694 INFO L82 PathProgramCache]: Analyzing trace with hash -457096584, now seen corresponding path program 81 times [2021-06-05 04:08:51,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:51,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541784035] [2021-06-05 04:08:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:51,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:51,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541784035] [2021-06-05 04:08:51,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541784035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:51,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022487488] [2021-06-05 04:08:51,737 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 04:08:51,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:08:51,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:51,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:51,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:51,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022487488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:51,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:51,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:08:51,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851802347] [2021-06-05 04:08:51,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:08:51,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:51,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:08:51,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:51,789 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:51,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:51,873 INFO L93 Difference]: Finished difference Result 329 states and 850 transitions. [2021-06-05 04:08:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:51,873 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:51,874 INFO L225 Difference]: With dead ends: 329 [2021-06-05 04:08:51,874 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 04:08:51,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:51,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 04:08:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 231. [2021-06-05 04:08:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.878260869565217) internal successors, (662), 230 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 662 transitions. [2021-06-05 04:08:51,882 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 662 transitions. Word has length 17 [2021-06-05 04:08:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:51,883 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 662 transitions. [2021-06-05 04:08:51,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 662 transitions. [2021-06-05 04:08:51,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:51,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:51,883 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:52,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1068,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:52,100 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:52,100 INFO L82 PathProgramCache]: Analyzing trace with hash -322053317, now seen corresponding path program 82 times [2021-06-05 04:08:52,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:52,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853815338] [2021-06-05 04:08:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:52,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:52,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853815338] [2021-06-05 04:08:52,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853815338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:52,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999324646] [2021-06-05 04:08:52,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:52,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:52,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:52,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:52,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:52,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999324646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:52,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:52,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:08:52,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899438814] [2021-06-05 04:08:52,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:08:52,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:52,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:08:52,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:52,188 INFO L87 Difference]: Start difference. First operand 231 states and 662 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:52,310 INFO L93 Difference]: Finished difference Result 375 states and 902 transitions. [2021-06-05 04:08:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:52,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:52,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:52,311 INFO L225 Difference]: With dead ends: 375 [2021-06-05 04:08:52,311 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 04:08:52,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 04:08:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 228. [2021-06-05 04:08:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.86784140969163) internal successors, (651), 227 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 651 transitions. [2021-06-05 04:08:52,315 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 651 transitions. Word has length 17 [2021-06-05 04:08:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:52,315 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 651 transitions. [2021-06-05 04:08:52,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 651 transitions. [2021-06-05 04:08:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:52,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:52,316 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:52,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-06-05 04:08:52,536 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:52,536 INFO L82 PathProgramCache]: Analyzing trace with hash -493623714, now seen corresponding path program 83 times [2021-06-05 04:08:52,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:52,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010433907] [2021-06-05 04:08:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:52,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:52,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010433907] [2021-06-05 04:08:52,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010433907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:52,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884071822] [2021-06-05 04:08:52,567 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 04:08:52,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:08:52,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:52,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:52,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:52,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884071822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:52,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:52,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:08:52,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236658385] [2021-06-05 04:08:52,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:52,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:52,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:52,621 INFO L87 Difference]: Start difference. First operand 228 states and 651 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:52,665 INFO L93 Difference]: Finished difference Result 391 states and 994 transitions. [2021-06-05 04:08:52,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:08:52,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:52,667 INFO L225 Difference]: With dead ends: 391 [2021-06-05 04:08:52,667 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 04:08:52,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 04:08:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 256. [2021-06-05 04:08:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.9686274509803923) internal successors, (757), 255 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 757 transitions. [2021-06-05 04:08:52,672 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 757 transitions. Word has length 17 [2021-06-05 04:08:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:52,672 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 757 transitions. [2021-06-05 04:08:52,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 757 transitions. [2021-06-05 04:08:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:52,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:52,673 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:52,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-06-05 04:08:52,881 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:52,881 INFO L82 PathProgramCache]: Analyzing trace with hash -412493429, now seen corresponding path program 84 times [2021-06-05 04:08:52,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:52,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709609689] [2021-06-05 04:08:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:52,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:52,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709609689] [2021-06-05 04:08:52,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709609689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:52,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528028890] [2021-06-05 04:08:52,909 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 04:08:52,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:08:52,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:52,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:52,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:52,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528028890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:52,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:52,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:08:52,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299863758] [2021-06-05 04:08:52,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:52,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:52,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:52,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:52,961 INFO L87 Difference]: Start difference. First operand 256 states and 757 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:53,040 INFO L93 Difference]: Finished difference Result 374 states and 958 transitions. [2021-06-05 04:08:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:53,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:53,041 INFO L225 Difference]: With dead ends: 374 [2021-06-05 04:08:53,041 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 04:08:53,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:53,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 04:08:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 269. [2021-06-05 04:08:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.003731343283582) internal successors, (805), 268 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 805 transitions. [2021-06-05 04:08:53,045 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 805 transitions. Word has length 17 [2021-06-05 04:08:53,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:53,045 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 805 transitions. [2021-06-05 04:08:53,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:53,045 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 805 transitions. [2021-06-05 04:08:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:53,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:53,046 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:53,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:53,247 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:53,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:53,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1101103778, now seen corresponding path program 85 times [2021-06-05 04:08:53,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:53,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255111938] [2021-06-05 04:08:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:53,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:53,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255111938] [2021-06-05 04:08:53,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255111938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:53,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606092907] [2021-06-05 04:08:53,282 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 04:08:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:53,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:53,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:53,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606092907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:53,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:53,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:08:53,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580709783] [2021-06-05 04:08:53,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:53,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:53,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:53,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:53,328 INFO L87 Difference]: Start difference. First operand 269 states and 805 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:53,403 INFO L93 Difference]: Finished difference Result 394 states and 1025 transitions. [2021-06-05 04:08:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:53,403 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:53,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:53,404 INFO L225 Difference]: With dead ends: 394 [2021-06-05 04:08:53,405 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 04:08:53,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:53,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 04:08:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 269. [2021-06-05 04:08:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0) internal successors, (804), 268 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 804 transitions. [2021-06-05 04:08:53,408 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 804 transitions. Word has length 17 [2021-06-05 04:08:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:53,409 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 804 transitions. [2021-06-05 04:08:53,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 804 transitions. [2021-06-05 04:08:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:53,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:53,409 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:53,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-06-05 04:08:53,610 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:53,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:53,610 INFO L82 PathProgramCache]: Analyzing trace with hash 439839995, now seen corresponding path program 86 times [2021-06-05 04:08:53,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:53,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655098704] [2021-06-05 04:08:53,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:53,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655098704] [2021-06-05 04:08:53,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655098704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334962521] [2021-06-05 04:08:53,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:53,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:53,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:53,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:53,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334962521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:53,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:53,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:08:53,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853241546] [2021-06-05 04:08:53,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:08:53,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:53,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:08:53,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:08:53,690 INFO L87 Difference]: Start difference. First operand 269 states and 804 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:53,733 INFO L93 Difference]: Finished difference Result 362 states and 940 transitions. [2021-06-05 04:08:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:08:53,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:53,735 INFO L225 Difference]: With dead ends: 362 [2021-06-05 04:08:53,735 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 04:08:53,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 04:08:53,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 249. [2021-06-05 04:08:53,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.963709677419355) internal successors, (735), 248 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 735 transitions. [2021-06-05 04:08:53,738 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 735 transitions. Word has length 17 [2021-06-05 04:08:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:53,738 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 735 transitions. [2021-06-05 04:08:53,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 735 transitions. [2021-06-05 04:08:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:53,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:53,739 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:53,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:53,939 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:53,940 INFO L82 PathProgramCache]: Analyzing trace with hash -672474590, now seen corresponding path program 87 times [2021-06-05 04:08:53,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:53,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997186390] [2021-06-05 04:08:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:53,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:53,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997186390] [2021-06-05 04:08:53,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997186390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:53,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327386030] [2021-06-05 04:08:53,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:53,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:08:53,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:53,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:53,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:54,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327386030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:54,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:54,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:54,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734579944] [2021-06-05 04:08:54,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:54,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:54,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:54,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:54,040 INFO L87 Difference]: Start difference. First operand 249 states and 735 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:54,134 INFO L93 Difference]: Finished difference Result 356 states and 958 transitions. [2021-06-05 04:08:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:54,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:54,136 INFO L225 Difference]: With dead ends: 356 [2021-06-05 04:08:54,136 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 04:08:54,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:54,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 04:08:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 263. [2021-06-05 04:08:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0) internal successors, (786), 262 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 04:08:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 786 transitions. [2021-06-05 04:08:54,141 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 786 transitions. Word has length 17 [2021-06-05 04:08:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:54,141 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 786 transitions. [2021-06-05 04:08:54,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 786 transitions. [2021-06-05 04:08:54,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:54,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:54,143 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:54,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:54,349 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1083164229, now seen corresponding path program 88 times [2021-06-05 04:08:54,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:54,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694697458] [2021-06-05 04:08:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:54,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:54,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694697458] [2021-06-05 04:08:54,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694697458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:54,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632091153] [2021-06-05 04:08:54,387 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 04:08:54,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:54,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:54,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:54,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:54,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632091153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:54,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:54,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:54,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070367250] [2021-06-05 04:08:54,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:54,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:54,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:54,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:54,455 INFO L87 Difference]: Start difference. First operand 263 states and 786 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:54,524 INFO L93 Difference]: Finished difference Result 358 states and 949 transitions. [2021-06-05 04:08:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:08:54,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:54,526 INFO L225 Difference]: With dead ends: 358 [2021-06-05 04:08:54,526 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 04:08:54,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 04:08:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 264. [2021-06-05 04:08:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9961977186311786) internal successors, (788), 263 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-06-05 04:08:54,531 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 17 [2021-06-05 04:08:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:54,531 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-06-05 04:08:54,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-06-05 04:08:54,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:54,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:54,532 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:54,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:54,732 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1724553762, now seen corresponding path program 89 times [2021-06-05 04:08:54,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:54,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455363593] [2021-06-05 04:08:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:54,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:54,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455363593] [2021-06-05 04:08:54,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455363593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:54,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152970688] [2021-06-05 04:08:54,776 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 04:08:54,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:08:54,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:54,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:54,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:54,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152970688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:54,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:54,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:08:54,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671687929] [2021-06-05 04:08:54,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:08:54,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:54,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:08:54,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:54,830 INFO L87 Difference]: Start difference. First operand 264 states and 788 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:54,919 INFO L93 Difference]: Finished difference Result 377 states and 1000 transitions. [2021-06-05 04:08:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:54,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:54,920 INFO L225 Difference]: With dead ends: 377 [2021-06-05 04:08:54,920 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 04:08:54,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 04:08:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 264. [2021-06-05 04:08:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9923954372623576) internal successors, (787), 263 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 787 transitions. [2021-06-05 04:08:54,926 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 787 transitions. Word has length 17 [2021-06-05 04:08:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:54,926 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 787 transitions. [2021-06-05 04:08:54,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 787 transitions. [2021-06-05 04:08:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:54,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:54,926 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:55,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:55,142 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:55,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:55,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1589510495, now seen corresponding path program 90 times [2021-06-05 04:08:55,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:55,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551172482] [2021-06-05 04:08:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:55,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:55,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551172482] [2021-06-05 04:08:55,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551172482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:55,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856901209] [2021-06-05 04:08:55,177 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 04:08:55,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:08:55,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:55,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:55,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856901209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:55,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:55,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:08:55,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016864181] [2021-06-05 04:08:55,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:08:55,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:55,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:08:55,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:55,232 INFO L87 Difference]: Start difference. First operand 264 states and 787 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:55,349 INFO L93 Difference]: Finished difference Result 370 states and 949 transitions. [2021-06-05 04:08:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:55,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:55,350 INFO L225 Difference]: With dead ends: 370 [2021-06-05 04:08:55,350 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 04:08:55,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:08:55,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 04:08:55,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 258. [2021-06-05 04:08:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.992217898832685) internal successors, (769), 257 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-06-05 04:08:55,354 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 17 [2021-06-05 04:08:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:55,354 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-06-05 04:08:55,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-06-05 04:08:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:55,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:55,355 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:55,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1077,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:55,569 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:55,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash 20730274, now seen corresponding path program 91 times [2021-06-05 04:08:55,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:55,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325854872] [2021-06-05 04:08:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:55,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:55,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325854872] [2021-06-05 04:08:55,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325854872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:55,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78258338] [2021-06-05 04:08:55,615 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 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 04:08:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:55,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:55,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:55,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78258338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:55,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:55,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:08:55,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811576980] [2021-06-05 04:08:55,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:08:55,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:55,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:08:55,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:55,677 INFO L87 Difference]: Start difference. First operand 258 states and 769 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:55,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:55,740 INFO L93 Difference]: Finished difference Result 319 states and 889 transitions. [2021-06-05 04:08:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:55,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:55,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:55,741 INFO L225 Difference]: With dead ends: 319 [2021-06-05 04:08:55,742 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 04:08:55,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:55,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 04:08:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 258. [2021-06-05 04:08:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9883268482490273) internal successors, (768), 257 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 768 transitions. [2021-06-05 04:08:55,746 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 768 transitions. Word has length 17 [2021-06-05 04:08:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:55,746 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 768 transitions. [2021-06-05 04:08:55,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:55,746 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 768 transitions. [2021-06-05 04:08:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:55,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:55,746 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:55,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-06-05 04:08:55,969 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash -106375557, now seen corresponding path program 92 times [2021-06-05 04:08:55,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:55,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299344931] [2021-06-05 04:08:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:56,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:56,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299344931] [2021-06-05 04:08:56,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299344931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:56,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237366098] [2021-06-05 04:08:56,044 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 04:08:56,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:56,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:56,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:56,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237366098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:56,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:56,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:08:56,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588231971] [2021-06-05 04:08:56,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:08:56,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:56,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:08:56,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:56,110 INFO L87 Difference]: Start difference. First operand 258 states and 768 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:56,261 INFO L93 Difference]: Finished difference Result 377 states and 992 transitions. [2021-06-05 04:08:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:56,261 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:56,262 INFO L225 Difference]: With dead ends: 377 [2021-06-05 04:08:56,262 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 04:08:56,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:08:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 04:08:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 266. [2021-06-05 04:08:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.9849056603773585) internal successors, (791), 265 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 791 transitions. [2021-06-05 04:08:56,265 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 791 transitions. Word has length 17 [2021-06-05 04:08:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:56,265 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 791 transitions. [2021-06-05 04:08:56,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 791 transitions. [2021-06-05 04:08:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:56,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:56,266 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:56,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 04:08:56,466 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:56,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1130090568, now seen corresponding path program 93 times [2021-06-05 04:08:56,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:56,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601561254] [2021-06-05 04:08:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:56,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:56,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601561254] [2021-06-05 04:08:56,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601561254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:56,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882264955] [2021-06-05 04:08:56,502 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 04:08:56,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:08:56,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:56,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:56,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:56,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882264955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:56,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:56,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:56,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273689896] [2021-06-05 04:08:56,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:56,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:56,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:56,560 INFO L87 Difference]: Start difference. First operand 266 states and 791 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:56,608 INFO L93 Difference]: Finished difference Result 455 states and 1181 transitions. [2021-06-05 04:08:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:08:56,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:56,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:56,609 INFO L225 Difference]: With dead ends: 455 [2021-06-05 04:08:56,609 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 04:08:56,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:56,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 04:08:56,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 307. [2021-06-05 04:08:56,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0784313725490198) internal successors, (942), 306 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 942 transitions. [2021-06-05 04:08:56,614 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 942 transitions. Word has length 17 [2021-06-05 04:08:56,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:56,614 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 942 transitions. [2021-06-05 04:08:56,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 942 transitions. [2021-06-05 04:08:56,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:56,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:56,614 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:56,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1080 [2021-06-05 04:08:56,825 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:56,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1048960283, now seen corresponding path program 94 times [2021-06-05 04:08:56,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:56,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829443278] [2021-06-05 04:08:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:56,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:56,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829443278] [2021-06-05 04:08:56,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829443278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:56,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659528652] [2021-06-05 04:08:56,872 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 04:08:56,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:56,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:56,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659528652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:56,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:56,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:56,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158855518] [2021-06-05 04:08:56,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:56,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:56,917 INFO L87 Difference]: Start difference. First operand 307 states and 942 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:57,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:57,017 INFO L93 Difference]: Finished difference Result 448 states and 1182 transitions. [2021-06-05 04:08:57,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:57,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:57,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:57,018 INFO L225 Difference]: With dead ends: 448 [2021-06-05 04:08:57,018 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 04:08:57,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:57,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 04:08:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 320. [2021-06-05 04:08:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.109717868338558) internal successors, (992), 319 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 992 transitions. [2021-06-05 04:08:57,022 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 992 transitions. Word has length 17 [2021-06-05 04:08:57,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:57,022 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 992 transitions. [2021-06-05 04:08:57,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 992 transitions. [2021-06-05 04:08:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:57,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:57,022 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:57,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:57,223 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:57,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:57,223 INFO L82 PathProgramCache]: Analyzing trace with hash 464636924, now seen corresponding path program 95 times [2021-06-05 04:08:57,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:57,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542626457] [2021-06-05 04:08:57,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:57,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:57,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542626457] [2021-06-05 04:08:57,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542626457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:57,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189434784] [2021-06-05 04:08:57,262 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 04:08:57,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:08:57,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:57,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:57,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189434784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:57,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:57,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:57,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516315162] [2021-06-05 04:08:57,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:57,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:57,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:57,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:57,309 INFO L87 Difference]: Start difference. First operand 320 states and 992 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:57,398 INFO L93 Difference]: Finished difference Result 458 states and 1214 transitions. [2021-06-05 04:08:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:57,398 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:57,399 INFO L225 Difference]: With dead ends: 458 [2021-06-05 04:08:57,399 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 04:08:57,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:57,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 04:08:57,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 309. [2021-06-05 04:08:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0779220779220777) internal successors, (948), 308 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 948 transitions. [2021-06-05 04:08:57,403 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 948 transitions. Word has length 17 [2021-06-05 04:08:57,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:57,403 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 948 transitions. [2021-06-05 04:08:57,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:57,403 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 948 transitions. [2021-06-05 04:08:57,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:57,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:57,404 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:57,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1082,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:57,604 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:57,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:57,605 INFO L82 PathProgramCache]: Analyzing trace with hash -196626859, now seen corresponding path program 96 times [2021-06-05 04:08:57,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:57,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781963919] [2021-06-05 04:08:57,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:57,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:57,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781963919] [2021-06-05 04:08:57,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781963919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:57,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412311073] [2021-06-05 04:08:57,657 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 04:08:57,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:08:57,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:57,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:57,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412311073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:57,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:57,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:57,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381994937] [2021-06-05 04:08:57,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:57,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:57,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:57,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:57,709 INFO L87 Difference]: Start difference. First operand 309 states and 948 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:57,762 INFO L93 Difference]: Finished difference Result 433 states and 1138 transitions. [2021-06-05 04:08:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:08:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:57,763 INFO L225 Difference]: With dead ends: 433 [2021-06-05 04:08:57,763 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 04:08:57,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:08:57,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 04:08:57,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 312. [2021-06-05 04:08:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0707395498392285) internal successors, (955), 311 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 955 transitions. [2021-06-05 04:08:57,769 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 955 transitions. Word has length 17 [2021-06-05 04:08:57,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:57,769 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 955 transitions. [2021-06-05 04:08:57,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 955 transitions. [2021-06-05 04:08:57,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:57,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:57,770 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:57,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-06-05 04:08:57,991 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:57,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1080301240, now seen corresponding path program 97 times [2021-06-05 04:08:57,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:57,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348166347] [2021-06-05 04:08:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:58,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:58,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348166347] [2021-06-05 04:08:58,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348166347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:58,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771763705] [2021-06-05 04:08:58,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:58,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:58,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771763705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:58,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:58,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:58,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649388142] [2021-06-05 04:08:58,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:58,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:58,071 INFO L87 Difference]: Start difference. First operand 312 states and 955 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:58,153 INFO L93 Difference]: Finished difference Result 472 states and 1273 transitions. [2021-06-05 04:08:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:58,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:58,154 INFO L225 Difference]: With dead ends: 472 [2021-06-05 04:08:58,154 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 04:08:58,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 04:08:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-06-05 04:08:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.071197411003236) internal successors, (949), 309 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:58,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 949 transitions. [2021-06-05 04:08:58,159 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 949 transitions. Word has length 17 [2021-06-05 04:08:58,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:58,159 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 949 transitions. [2021-06-05 04:08:58,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 949 transitions. [2021-06-05 04:08:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:58,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:58,160 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:58,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:58,382 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:58,382 INFO L82 PathProgramCache]: Analyzing trace with hash 2037480635, now seen corresponding path program 98 times [2021-06-05 04:08:58,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:58,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141379019] [2021-06-05 04:08:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:58,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141379019] [2021-06-05 04:08:58,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141379019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793370485] [2021-06-05 04:08:58,426 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 04:08:58,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:58,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:58,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:58,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793370485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:58,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:58,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:58,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696696430] [2021-06-05 04:08:58,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:58,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:58,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:58,486 INFO L87 Difference]: Start difference. First operand 310 states and 949 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:58,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:58,558 INFO L93 Difference]: Finished difference Result 407 states and 1107 transitions. [2021-06-05 04:08:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:08:58,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:58,560 INFO L225 Difference]: With dead ends: 407 [2021-06-05 04:08:58,560 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 04:08:58,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 04:08:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 318. [2021-06-05 04:08:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0757097791798107) internal successors, (975), 317 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 975 transitions. [2021-06-05 04:08:58,564 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 975 transitions. Word has length 17 [2021-06-05 04:08:58,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:58,565 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 975 transitions. [2021-06-05 04:08:58,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 975 transitions. [2021-06-05 04:08:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:58,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:58,565 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:58,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:58,777 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:58,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1308941444, now seen corresponding path program 99 times [2021-06-05 04:08:58,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:58,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501430932] [2021-06-05 04:08:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:58,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:58,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501430932] [2021-06-05 04:08:58,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501430932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:58,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320460483] [2021-06-05 04:08:58,817 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 04:08:58,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:08:58,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:58,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:58,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320460483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:58,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:58,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:08:58,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842924844] [2021-06-05 04:08:58,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:08:58,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:58,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:08:58,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:08:58,872 INFO L87 Difference]: Start difference. First operand 318 states and 975 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:58,963 INFO L93 Difference]: Finished difference Result 452 states and 1242 transitions. [2021-06-05 04:08:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:58,964 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:58,965 INFO L225 Difference]: With dead ends: 452 [2021-06-05 04:08:58,965 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 04:08:58,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 04:08:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 318. [2021-06-05 04:08:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0725552050473186) internal successors, (974), 317 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 974 transitions. [2021-06-05 04:08:58,970 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 974 transitions. Word has length 17 [2021-06-05 04:08:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:58,970 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 974 transitions. [2021-06-05 04:08:58,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:08:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 974 transitions. [2021-06-05 04:08:58,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:58,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:58,971 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:59,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:59,189 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:59,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1933946680, now seen corresponding path program 100 times [2021-06-05 04:08:59,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:59,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23224661] [2021-06-05 04:08:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:59,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:59,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23224661] [2021-06-05 04:08:59,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23224661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:59,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579596955] [2021-06-05 04:08:59,222 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 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 04:08:59,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:59,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:59,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579596955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:59,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:59,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:08:59,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823980422] [2021-06-05 04:08:59,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:08:59,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:59,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:08:59,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:59,286 INFO L87 Difference]: Start difference. First operand 318 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:59,377 INFO L93 Difference]: Finished difference Result 444 states and 1227 transitions. [2021-06-05 04:08:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:59,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:59,378 INFO L225 Difference]: With dead ends: 444 [2021-06-05 04:08:59,378 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 04:08:59,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 04:08:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 332. [2021-06-05 04:08:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.090634441087613) internal successors, (1023), 331 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1023 transitions. [2021-06-05 04:08:59,382 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1023 transitions. Word has length 17 [2021-06-05 04:08:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:59,382 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1023 transitions. [2021-06-05 04:08:59,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1023 transitions. [2021-06-05 04:08:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:59,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:59,383 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:59,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:59,583 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:59,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2068989947, now seen corresponding path program 101 times [2021-06-05 04:08:59,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:59,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151581204] [2021-06-05 04:08:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:59,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:59,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151581204] [2021-06-05 04:08:59,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151581204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:59,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137518573] [2021-06-05 04:08:59,621 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 04:08:59,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:08:59,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:59,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:08:59,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:59,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137518573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:59,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:59,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:08:59,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964947456] [2021-06-05 04:08:59,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:08:59,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:59,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:08:59,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:08:59,748 INFO L87 Difference]: Start difference. First operand 332 states and 1023 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:59,839 INFO L93 Difference]: Finished difference Result 419 states and 1186 transitions. [2021-06-05 04:08:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:08:59,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:08:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:59,840 INFO L225 Difference]: With dead ends: 419 [2021-06-05 04:08:59,840 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 04:08:59,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 04:08:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 347. [2021-06-05 04:08:59,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0895953757225434) internal successors, (1069), 346 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 04:08:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1069 transitions. [2021-06-05 04:08:59,844 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1069 transitions. Word has length 17 [2021-06-05 04:08:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:59,844 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1069 transitions. [2021-06-05 04:08:59,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:08:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1069 transitions. [2021-06-05 04:08:59,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:08:59,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:59,844 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:00,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-06-05 04:09:00,045 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:00,045 INFO L82 PathProgramCache]: Analyzing trace with hash -615736580, now seen corresponding path program 102 times [2021-06-05 04:09:00,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:00,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501960517] [2021-06-05 04:09:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:00,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:00,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501960517] [2021-06-05 04:09:00,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501960517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:00,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897123407] [2021-06-05 04:09:00,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:09:00,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:09:00,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:00,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:09:00,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:00,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897123407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:00,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:00,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:09:00,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454209234] [2021-06-05 04:09:00,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:09:00,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:00,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:09:00,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:09:00,160 INFO L87 Difference]: Start difference. First operand 347 states and 1069 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:09:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:00,227 INFO L93 Difference]: Finished difference Result 413 states and 1199 transitions. [2021-06-05 04:09:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:09:00,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:09:00,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:00,229 INFO L225 Difference]: With dead ends: 413 [2021-06-05 04:09:00,229 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 04:09:00,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:09:00,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 04:09:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 347. [2021-06-05 04:09:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-06-05 04:09:00,234 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-06-05 04:09:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:00,234 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-06-05 04:09:00,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:09:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-06-05 04:09:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:09:00,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:00,235 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:00,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-06-05 04:09:00,445 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:00,445 INFO L82 PathProgramCache]: Analyzing trace with hash -742842411, now seen corresponding path program 103 times [2021-06-05 04:09:00,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:00,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577248438] [2021-06-05 04:09:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:00,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:00,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577248438] [2021-06-05 04:09:00,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577248438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:00,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296810301] [2021-06-05 04:09:00,492 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 04:09:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:00,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:09:00,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:00,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296810301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:00,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:00,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:09:00,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624452414] [2021-06-05 04:09:00,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:09:00,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:00,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:09:00,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:09:00,560 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:09:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:00,687 INFO L93 Difference]: Finished difference Result 418 states and 1194 transitions. [2021-06-05 04:09:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:09:00,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:09:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:00,688 INFO L225 Difference]: With dead ends: 418 [2021-06-05 04:09:00,688 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 04:09:00,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:09:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 04:09:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 347. [2021-06-05 04:09:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-06-05 04:09:00,693 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-06-05 04:09:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:00,693 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-06-05 04:09:00,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:09:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-06-05 04:09:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:09:00,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:00,694 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:00,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1090 [2021-06-05 04:09:00,912 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:00,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:00,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1948460984, now seen corresponding path program 104 times [2021-06-05 04:09:00,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:00,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188660546] [2021-06-05 04:09:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:00,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:00,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188660546] [2021-06-05 04:09:00,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188660546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:00,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087100347] [2021-06-05 04:09:00,960 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 04:09:00,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:00,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:00,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:09:00,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:01,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087100347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:01,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:01,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:09:01,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351328010] [2021-06-05 04:09:01,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:09:01,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:01,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:09:01,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:09:01,025 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:09:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:01,075 INFO L93 Difference]: Finished difference Result 411 states and 1195 transitions. [2021-06-05 04:09:01,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:09:01,076 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:09:01,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:01,077 INFO L225 Difference]: With dead ends: 411 [2021-06-05 04:09:01,077 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 04:09:01,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:09:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 04:09:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 345. [2021-06-05 04:09:01,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0930232558139537) internal successors, (1064), 344 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1064 transitions. [2021-06-05 04:09:01,081 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1064 transitions. Word has length 17 [2021-06-05 04:09:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:01,082 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1064 transitions. [2021-06-05 04:09:01,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:09:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1064 transitions. [2021-06-05 04:09:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:09:01,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:01,082 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:01,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:01,305 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2010299589, now seen corresponding path program 105 times [2021-06-05 04:09:01,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:01,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184913600] [2021-06-05 04:09:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:01,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:01,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184913600] [2021-06-05 04:09:01,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184913600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:01,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337487283] [2021-06-05 04:09:01,347 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 04:09:01,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:09:01,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:09:01,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:01,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337487283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:01,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:01,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:09:01,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346769147] [2021-06-05 04:09:01,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:09:01,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:01,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:09:01,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:09:01,402 INFO L87 Difference]: Start difference. First operand 345 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:09:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:01,512 INFO L93 Difference]: Finished difference Result 476 states and 1343 transitions. [2021-06-05 04:09:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:09:01,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:09:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:01,513 INFO L225 Difference]: With dead ends: 476 [2021-06-05 04:09:01,513 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 04:09:01,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:09:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 04:09:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 355. [2021-06-05 04:09:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0819209039548023) internal successors, (1091), 354 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1091 transitions. [2021-06-05 04:09:01,518 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1091 transitions. Word has length 17 [2021-06-05 04:09:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:01,518 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1091 transitions. [2021-06-05 04:09:01,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 04:09:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1091 transitions. [2021-06-05 04:09:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:01,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:01,518 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:01,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1092,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:01,719 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:01,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1640906887, now seen corresponding path program 106 times [2021-06-05 04:09:01,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:01,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566134896] [2021-06-05 04:09:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:01,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:01,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566134896] [2021-06-05 04:09:01,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566134896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:01,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972878416] [2021-06-05 04:09:01,810 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 04:09:01,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:01,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:01,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:01,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:02,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:02,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:02,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:02,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:02,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:02,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:09:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:02,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972878416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:02,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:02,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:02,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368589846] [2021-06-05 04:09:02,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:02,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:02,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:02,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:02,435 INFO L87 Difference]: Start difference. First operand 355 states and 1091 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:02,702 INFO L93 Difference]: Finished difference Result 425 states and 1234 transitions. [2021-06-05 04:09:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:09:02,702 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:02,703 INFO L225 Difference]: With dead ends: 425 [2021-06-05 04:09:02,703 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 04:09:02,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:09:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 04:09:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 369. [2021-06-05 04:09:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.078804347826087) internal successors, (1133), 368 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1133 transitions. [2021-06-05 04:09:02,707 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1133 transitions. Word has length 18 [2021-06-05 04:09:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:02,707 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1133 transitions. [2021-06-05 04:09:02,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1133 transitions. [2021-06-05 04:09:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:02,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:02,707 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:02,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:02,908 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1149194617, now seen corresponding path program 107 times [2021-06-05 04:09:02,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:02,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86283235] [2021-06-05 04:09:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:03,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:03,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86283235] [2021-06-05 04:09:03,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86283235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:03,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250335748] [2021-06-05 04:09:03,004 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 04:09:03,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:09:03,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:03,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:09:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:03,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:03,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:03,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:03,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:03,732 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 04:09:03,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:3 [2021-06-05 04:09:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:03,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250335748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:03,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:03,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:03,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464957421] [2021-06-05 04:09:03,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:03,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:03,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:03,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:03,737 INFO L87 Difference]: Start difference. First operand 369 states and 1133 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:03,972 INFO L93 Difference]: Finished difference Result 444 states and 1291 transitions. [2021-06-05 04:09:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:09:03,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:03,973 INFO L225 Difference]: With dead ends: 444 [2021-06-05 04:09:03,973 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 04:09:03,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 04:09:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 384. [2021-06-05 04:09:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-05 04:09:03,978 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-06-05 04:09:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:03,978 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-05 04:09:03,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-05 04:09:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:03,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:03,978 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:04,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1202 [2021-06-05 04:09:04,179 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:04,179 INFO L82 PathProgramCache]: Analyzing trace with hash -405611257, now seen corresponding path program 108 times [2021-06-05 04:09:04,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:04,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248434585] [2021-06-05 04:09:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:04,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:04,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248434585] [2021-06-05 04:09:04,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248434585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:04,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466178241] [2021-06-05 04:09:04,260 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 04:09:04,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:09:04,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:04,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:04,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:04,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:04,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:04,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:04,997 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:04,998 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:04,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:05,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:05,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:05,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:05,163 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:05,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:05,163 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:05,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466178241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:05,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:05,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:05,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728470202] [2021-06-05 04:09:05,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:05,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:05,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:05,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:05,191 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:05,474 INFO L93 Difference]: Finished difference Result 463 states and 1333 transitions. [2021-06-05 04:09:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:09:05,475 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:05,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:05,475 INFO L225 Difference]: With dead ends: 463 [2021-06-05 04:09:05,475 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 04:09:05,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 04:09:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 384. [2021-06-05 04:09:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-05 04:09:05,480 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-06-05 04:09:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:05,480 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-05 04:09:05,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-05 04:09:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:05,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:05,481 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:05,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:05,681 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1622768455, now seen corresponding path program 109 times [2021-06-05 04:09:05,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:05,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145692865] [2021-06-05 04:09:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:05,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:05,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145692865] [2021-06-05 04:09:05,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145692865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:05,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952646200] [2021-06-05 04:09:05,780 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 04:09:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:05,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:05,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:06,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:06,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:06,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:06,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:06,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:06,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:09:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:06,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952646200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:06,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:06,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:06,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213455575] [2021-06-05 04:09:06,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:06,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:06,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:06,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:06,270 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:06,570 INFO L93 Difference]: Finished difference Result 479 states and 1440 transitions. [2021-06-05 04:09:06,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:09:06,571 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:06,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:06,572 INFO L225 Difference]: With dead ends: 479 [2021-06-05 04:09:06,572 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 04:09:06,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 04:09:06,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 423. [2021-06-05 04:09:06,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.146919431279621) internal successors, (1328), 422 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1328 transitions. [2021-06-05 04:09:06,578 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1328 transitions. Word has length 18 [2021-06-05 04:09:06,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:06,578 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1328 transitions. [2021-06-05 04:09:06,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:06,578 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1328 transitions. [2021-06-05 04:09:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:06,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:06,579 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:06,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1417,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:06,785 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:06,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1928615481, now seen corresponding path program 110 times [2021-06-05 04:09:06,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:06,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100530744] [2021-06-05 04:09:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:06,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:06,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100530744] [2021-06-05 04:09:06,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100530744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:06,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881425984] [2021-06-05 04:09:06,875 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 04:09:06,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:06,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:06,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:06,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:07,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:07,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:07,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:07,485 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:07,486 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:07,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:07,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:07,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:07,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:07,878 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:07,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:07,879 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:07,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881425984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:07,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:07,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:07,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502908098] [2021-06-05 04:09:07,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:07,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:07,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:07,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:07,906 INFO L87 Difference]: Start difference. First operand 423 states and 1328 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:08,244 INFO L93 Difference]: Finished difference Result 513 states and 1501 transitions. [2021-06-05 04:09:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:09:08,244 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:08,245 INFO L225 Difference]: With dead ends: 513 [2021-06-05 04:09:08,245 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 04:09:08,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:09:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 04:09:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 422. [2021-06-05 04:09:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.125890736342043) internal successors, (1316), 421 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1316 transitions. [2021-06-05 04:09:08,250 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1316 transitions. Word has length 18 [2021-06-05 04:09:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:08,250 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1316 transitions. [2021-06-05 04:09:08,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1316 transitions. [2021-06-05 04:09:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:08,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:08,251 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:08,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-05 04:09:08,465 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1077471349, now seen corresponding path program 111 times [2021-06-05 04:09:08,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:08,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430188920] [2021-06-05 04:09:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:08,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:08,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430188920] [2021-06-05 04:09:08,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430188920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:08,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279474475] [2021-06-05 04:09:08,558 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 04:09:08,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:09:08,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:08,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:08,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:08,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:09,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:09,195 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:09,196 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:09,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:09,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:09,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:09,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:09,580 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:09,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:09,580 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:09,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279474475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:09,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:09,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:09,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528605679] [2021-06-05 04:09:09,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:09,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:09,621 INFO L87 Difference]: Start difference. First operand 422 states and 1316 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:09,947 INFO L93 Difference]: Finished difference Result 479 states and 1433 transitions. [2021-06-05 04:09:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:09:09,948 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:09,948 INFO L225 Difference]: With dead ends: 479 [2021-06-05 04:09:09,948 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 04:09:09,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 339.6ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:09:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 04:09:09,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 424. [2021-06-05 04:09:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1252955082742315) internal successors, (1322), 423 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:09,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1322 transitions. [2021-06-05 04:09:09,953 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1322 transitions. Word has length 18 [2021-06-05 04:09:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:09,953 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1322 transitions. [2021-06-05 04:09:09,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1322 transitions. [2021-06-05 04:09:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:09,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:09,954 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:10,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:10,154 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:10,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:10,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1654277767, now seen corresponding path program 112 times [2021-06-05 04:09:10,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:10,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771440962] [2021-06-05 04:09:10,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:10,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771440962] [2021-06-05 04:09:10,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771440962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778259521] [2021-06-05 04:09:10,241 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 04:09:10,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:10,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:10,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:10,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:10,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:10,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:10,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:10,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:09:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:10,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778259521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:10,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:10,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:10,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116426764] [2021-06-05 04:09:10,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:10,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:10,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:10,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:10,728 INFO L87 Difference]: Start difference. First operand 424 states and 1322 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:11,046 INFO L93 Difference]: Finished difference Result 515 states and 1560 transitions. [2021-06-05 04:09:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:09:11,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:11,047 INFO L225 Difference]: With dead ends: 515 [2021-06-05 04:09:11,047 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 04:09:11,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 04:09:11,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 458. [2021-06-05 04:09:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1531728665207877) internal successors, (1441), 457 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1441 transitions. [2021-06-05 04:09:11,052 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1441 transitions. Word has length 18 [2021-06-05 04:09:11,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:11,052 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1441 transitions. [2021-06-05 04:09:11,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:11,052 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1441 transitions. [2021-06-05 04:09:11,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:11,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:11,053 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:11,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:11,257 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1897106169, now seen corresponding path program 113 times [2021-06-05 04:09:11,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:11,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495273294] [2021-06-05 04:09:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:11,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:11,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495273294] [2021-06-05 04:09:11,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495273294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:11,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216738158] [2021-06-05 04:09:11,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:09:11,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:09:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:11,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:11,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:11,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:11,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:12,037 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:12,037 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:12,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:12,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:12,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:12,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:12,275 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:12,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:12,276 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:12,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216738158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:12,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:12,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:12,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544504976] [2021-06-05 04:09:12,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:12,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:12,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:12,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:12,312 INFO L87 Difference]: Start difference. First operand 458 states and 1441 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:12,893 INFO L93 Difference]: Finished difference Result 583 states and 1699 transitions. [2021-06-05 04:09:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:09:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:12,895 INFO L225 Difference]: With dead ends: 583 [2021-06-05 04:09:12,895 INFO L226 Difference]: Without dead ends: 557 [2021-06-05 04:09:12,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:09:12,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-05 04:09:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 462. [2021-06-05 04:09:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1496746203904555) internal successors, (1452), 461 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1452 transitions. [2021-06-05 04:09:12,903 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1452 transitions. Word has length 18 [2021-06-05 04:09:12,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:12,903 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1452 transitions. [2021-06-05 04:09:12,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1452 transitions. [2021-06-05 04:09:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:12,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:12,904 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:13,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-05 04:09:13,125 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:13,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1045962037, now seen corresponding path program 114 times [2021-06-05 04:09:13,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:13,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851545245] [2021-06-05 04:09:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:13,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:13,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851545245] [2021-06-05 04:09:13,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851545245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:13,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202520138] [2021-06-05 04:09:13,200 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 04:09:13,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:09:13,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:13,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:13,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:13,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:13,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:13,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:13,698 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:13,698 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:13,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:13,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:13,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:13,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:13,819 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:13,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:13,820 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:13,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202520138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:13,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:13,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:13,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632360484] [2021-06-05 04:09:13,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:13,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:13,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:13,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:13,845 INFO L87 Difference]: Start difference. First operand 462 states and 1452 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:14,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:14,254 INFO L93 Difference]: Finished difference Result 516 states and 1564 transitions. [2021-06-05 04:09:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:09:14,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:14,255 INFO L225 Difference]: With dead ends: 516 [2021-06-05 04:09:14,255 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 04:09:14,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:09:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 04:09:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 464. [2021-06-05 04:09:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-06-05 04:09:14,260 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-06-05 04:09:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:14,260 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-06-05 04:09:14,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:14,261 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-06-05 04:09:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:14,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:14,261 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:14,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:14,462 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:14,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash -430297721, now seen corresponding path program 115 times [2021-06-05 04:09:14,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:14,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726410226] [2021-06-05 04:09:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:14,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:14,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726410226] [2021-06-05 04:09:14,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726410226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:14,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420572627] [2021-06-05 04:09:14,538 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 04:09:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:14,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:14,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:14,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:14,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:15,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:15,195 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:15,196 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:15,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:15,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:15,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:15,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:15,299 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:15,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:15,299 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:15,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420572627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:15,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:15,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:15,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265440979] [2021-06-05 04:09:15,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:15,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:15,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:15,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:15,325 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:15,753 INFO L93 Difference]: Finished difference Result 532 states and 1598 transitions. [2021-06-05 04:09:15,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:09:15,753 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:15,754 INFO L225 Difference]: With dead ends: 532 [2021-06-05 04:09:15,754 INFO L226 Difference]: Without dead ends: 522 [2021-06-05 04:09:15,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:09:15,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-05 04:09:15,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 464. [2021-06-05 04:09:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-06-05 04:09:15,759 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-06-05 04:09:15,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:15,760 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-06-05 04:09:15,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-06-05 04:09:15,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:15,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:15,760 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:15,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:15,962 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:15,963 INFO L82 PathProgramCache]: Analyzing trace with hash -486883791, now seen corresponding path program 116 times [2021-06-05 04:09:15,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:15,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641208332] [2021-06-05 04:09:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:09:16,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:16,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641208332] [2021-06-05 04:09:16,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641208332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:16,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880097425] [2021-06-05 04:09:16,036 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 04:09:16,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:16,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:16,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:16,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:16,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:16,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:16,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:16,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:16,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:09:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:16,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880097425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:16,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:16,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-06-05 04:09:16,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976994787] [2021-06-05 04:09:16,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:09:16,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:16,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:09:16,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:09:16,601 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:16,794 INFO L93 Difference]: Finished difference Result 485 states and 1487 transitions. [2021-06-05 04:09:16,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:16,794 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:16,796 INFO L225 Difference]: With dead ends: 485 [2021-06-05 04:09:16,796 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 04:09:16,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 04:09:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 464. [2021-06-05 04:09:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-06-05 04:09:16,810 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-06-05 04:09:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:16,810 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-06-05 04:09:16,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-06-05 04:09:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:16,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:16,811 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:17,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2163,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:17,033 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash -100682677, now seen corresponding path program 117 times [2021-06-05 04:09:17,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:17,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581569314] [2021-06-05 04:09:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:17,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:17,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581569314] [2021-06-05 04:09:17,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581569314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:17,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848781781] [2021-06-05 04:09:17,099 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 04:09:17,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:09:17,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:17,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:17,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:17,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:17,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:17,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:17,571 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:17,571 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:17,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:17,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:17,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:17,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:17,965 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:17,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:17,966 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:17,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848781781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:17,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:17,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 04:09:17,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611206745] [2021-06-05 04:09:17,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:09:17,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:17,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:09:17,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:17,989 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:18,308 INFO L93 Difference]: Finished difference Result 544 states and 1603 transitions. [2021-06-05 04:09:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:09:18,309 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:18,310 INFO L225 Difference]: With dead ends: 544 [2021-06-05 04:09:18,310 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 04:09:18,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:09:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 04:09:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 464. [2021-06-05 04:09:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-06-05 04:09:18,318 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-06-05 04:09:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:18,318 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-06-05 04:09:18,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:18,318 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-06-05 04:09:18,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:18,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:18,319 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:18,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2246 [2021-06-05 04:09:18,540 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash 437172901, now seen corresponding path program 118 times [2021-06-05 04:09:18,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:18,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158578789] [2021-06-05 04:09:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:18,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:18,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158578789] [2021-06-05 04:09:18,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158578789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:18,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122508595] [2021-06-05 04:09:18,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:09:18,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:18,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:18,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:18,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:18,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:18,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:19,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:19,267 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:19,267 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:19,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:19,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:19,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:19,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:19,485 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:19,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:19,486 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:19,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122508595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:19,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:19,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:19,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403753850] [2021-06-05 04:09:19,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:19,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:19,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:19,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:19,518 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:20,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:20,126 INFO L93 Difference]: Finished difference Result 595 states and 1709 transitions. [2021-06-05 04:09:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:09:20,126 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:20,127 INFO L225 Difference]: With dead ends: 595 [2021-06-05 04:09:20,127 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 04:09:20,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 493.3ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:09:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 04:09:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 455. [2021-06-05 04:09:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.13215859030837) internal successors, (1422), 454 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1422 transitions. [2021-06-05 04:09:20,133 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1422 transitions. Word has length 18 [2021-06-05 04:09:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:20,133 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1422 transitions. [2021-06-05 04:09:20,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1422 transitions. [2021-06-05 04:09:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:20,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:20,134 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:20,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2404,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:20,334 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:20,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1052837217, now seen corresponding path program 119 times [2021-06-05 04:09:20,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:20,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89127912] [2021-06-05 04:09:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:20,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:20,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89127912] [2021-06-05 04:09:20,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89127912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:20,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262651532] [2021-06-05 04:09:20,411 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 04:09:20,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:09:20,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:20,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 04:09:20,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:20,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:20,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 35 treesize of output 252 [2021-06-05 04:09:22,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:09:22,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:22,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:22,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:22,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:22,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 04:09:23,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:09:23,823 INFO L628 ElimStorePlain]: treesize reduction 40, result has 27.3 percent of original size [2021-06-05 04:09:23,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:23,823 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:124, output treesize:15 [2021-06-05 04:09:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:23,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262651532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:23,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:23,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:23,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644615403] [2021-06-05 04:09:23,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:23,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:23,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:23,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:23,849 INFO L87 Difference]: Start difference. First operand 455 states and 1422 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:24,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:24,190 INFO L93 Difference]: Finished difference Result 521 states and 1560 transitions. [2021-06-05 04:09:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:09:24,190 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:24,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:24,191 INFO L225 Difference]: With dead ends: 521 [2021-06-05 04:09:24,191 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 04:09:24,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:09:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 04:09:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 456. [2021-06-05 04:09:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.131868131868132) internal successors, (1425), 455 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1425 transitions. [2021-06-05 04:09:24,195 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1425 transitions. Word has length 18 [2021-06-05 04:09:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:24,196 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1425 transitions. [2021-06-05 04:09:24,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1425 transitions. [2021-06-05 04:09:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:24,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:24,196 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:24,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2515 [2021-06-05 04:09:24,397 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:24,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:24,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1663900857, now seen corresponding path program 120 times [2021-06-05 04:09:24,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:24,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164322788] [2021-06-05 04:09:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:24,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:24,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164322788] [2021-06-05 04:09:24,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164322788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:24,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694786656] [2021-06-05 04:09:24,473 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 04:09:24,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:09:24,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:24,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:24,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:24,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:24,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:24,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:24,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:24,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:24,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:09:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:24,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694786656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:24,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:24,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:24,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067198031] [2021-06-05 04:09:24,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:24,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:24,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:24,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:24,946 INFO L87 Difference]: Start difference. First operand 456 states and 1425 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:25,309 INFO L93 Difference]: Finished difference Result 558 states and 1698 transitions. [2021-06-05 04:09:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:09:25,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:25,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:25,310 INFO L225 Difference]: With dead ends: 558 [2021-06-05 04:09:25,310 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 04:09:25,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:25,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 04:09:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 500. [2021-06-05 04:09:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.158316633266533) internal successors, (1576), 499 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1576 transitions. [2021-06-05 04:09:25,316 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1576 transitions. Word has length 18 [2021-06-05 04:09:25,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:25,316 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1576 transitions. [2021-06-05 04:09:25,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1576 transitions. [2021-06-05 04:09:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:25,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:25,316 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:25,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:25,517 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash -920317497, now seen corresponding path program 121 times [2021-06-05 04:09:25,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:25,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978791628] [2021-06-05 04:09:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:25,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:25,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978791628] [2021-06-05 04:09:25,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978791628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:25,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99813307] [2021-06-05 04:09:25,598 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 04:09:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:25,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:25,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:25,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:25,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:25,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:26,122 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:26,123 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:26,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:26,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:26,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:26,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:26,244 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:26,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:26,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:26,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99813307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:26,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:26,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:26,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313055840] [2021-06-05 04:09:26,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:26,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:26,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:26,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:26,272 INFO L87 Difference]: Start difference. First operand 500 states and 1576 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:26,895 INFO L93 Difference]: Finished difference Result 647 states and 1895 transitions. [2021-06-05 04:09:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:09:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:26,897 INFO L225 Difference]: With dead ends: 647 [2021-06-05 04:09:26,897 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 04:09:26,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 433.7ms TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:09:26,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 04:09:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 506. [2021-06-05 04:09:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.1623762376237625) internal successors, (1597), 505 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1597 transitions. [2021-06-05 04:09:26,905 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1597 transitions. Word has length 18 [2021-06-05 04:09:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:26,906 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1597 transitions. [2021-06-05 04:09:26,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1597 transitions. [2021-06-05 04:09:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:26,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:26,907 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:27,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3060 [2021-06-05 04:09:27,121 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:27,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:27,121 INFO L82 PathProgramCache]: Analyzing trace with hash -69173365, now seen corresponding path program 122 times [2021-06-05 04:09:27,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:27,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659653133] [2021-06-05 04:09:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:27,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:27,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659653133] [2021-06-05 04:09:27,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659653133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:27,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122591396] [2021-06-05 04:09:27,209 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 04:09:27,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:27,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:27,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:27,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:27,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:27,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:27,737 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:27,737 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:27,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:28,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:28,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:28,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:28,071 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:28,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:28,072 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:28,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122591396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:28,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:28,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:28,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82720653] [2021-06-05 04:09:28,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:28,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:28,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:28,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:28,098 INFO L87 Difference]: Start difference. First operand 506 states and 1597 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:28,829 INFO L93 Difference]: Finished difference Result 727 states and 2070 transitions. [2021-06-05 04:09:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:09:28,829 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:28,830 INFO L225 Difference]: With dead ends: 727 [2021-06-05 04:09:28,830 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 04:09:28,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 551.5ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:09:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 04:09:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 507. [2021-06-05 04:09:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-05 04:09:28,836 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-05 04:09:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:28,836 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-05 04:09:28,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-05 04:09:28,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:28,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:28,837 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:29,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3155 [2021-06-05 04:09:29,038 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash 546490951, now seen corresponding path program 123 times [2021-06-05 04:09:29,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:29,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724818327] [2021-06-05 04:09:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:29,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:29,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724818327] [2021-06-05 04:09:29,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724818327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:29,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366091460] [2021-06-05 04:09:29,128 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 04:09:29,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:09:29,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:29,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:29,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:29,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:29,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:29,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:29,628 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:29,628 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:29,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:30,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:30,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:30,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:30,067 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:30,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:30,068 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:30,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366091460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:30,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:30,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:30,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306994860] [2021-06-05 04:09:30,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:30,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:30,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:30,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:30,094 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:30,521 INFO L93 Difference]: Finished difference Result 598 states and 1790 transitions. [2021-06-05 04:09:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:09:30,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:30,522 INFO L225 Difference]: With dead ends: 598 [2021-06-05 04:09:30,522 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 04:09:30,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:09:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 04:09:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 507. [2021-06-05 04:09:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-05 04:09:30,527 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-05 04:09:30,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:30,528 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-05 04:09:30,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-05 04:09:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:30,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:30,528 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:30,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-06-05 04:09:30,729 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1842751733, now seen corresponding path program 124 times [2021-06-05 04:09:30,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:30,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761023604] [2021-06-05 04:09:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:30,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:30,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761023604] [2021-06-05 04:09:30,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761023604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:30,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914798643] [2021-06-05 04:09:30,822 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 04:09:30,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:30,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:30,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:30,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:31,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:31,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:31,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:31,385 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:31,386 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:31,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:31,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:31,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:31,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:31,829 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:31,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:31,830 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:31,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914798643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:31,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:31,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:31,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676802992] [2021-06-05 04:09:31,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:31,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:31,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:31,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:31,855 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:32,297 INFO L93 Difference]: Finished difference Result 608 states and 1810 transitions. [2021-06-05 04:09:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:09:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:32,298 INFO L225 Difference]: With dead ends: 608 [2021-06-05 04:09:32,298 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 04:09:32,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 457.2ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:09:32,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 04:09:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 507. [2021-06-05 04:09:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-05 04:09:32,305 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-05 04:09:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:32,305 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-05 04:09:32,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-05 04:09:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:32,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:32,306 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:32,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-06-05 04:09:32,521 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1754340969, now seen corresponding path program 125 times [2021-06-05 04:09:32,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:32,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47057260] [2021-06-05 04:09:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:32,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:32,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47057260] [2021-06-05 04:09:32,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47057260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:32,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505628102] [2021-06-05 04:09:32,595 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 04:09:32,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:09:32,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:32,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:32,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:32,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:32,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:33,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:33,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:33,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:33,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:09:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:33,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505628102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:33,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:33,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 04:09:33,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666927509] [2021-06-05 04:09:33,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:09:33,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:09:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:33,054 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:33,290 INFO L93 Difference]: Finished difference Result 537 states and 1638 transitions. [2021-06-05 04:09:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:09:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:33,291 INFO L225 Difference]: With dead ends: 537 [2021-06-05 04:09:33,291 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 04:09:33,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:09:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 04:09:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 507. [2021-06-05 04:09:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-06-05 04:09:33,296 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-06-05 04:09:33,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:33,296 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-06-05 04:09:33,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-06-05 04:09:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:33,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:33,297 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:33,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-06-05 04:09:33,497 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash -214619961, now seen corresponding path program 126 times [2021-06-05 04:09:33,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:33,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722324595] [2021-06-05 04:09:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:33,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:33,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722324595] [2021-06-05 04:09:33,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722324595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:33,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501518268] [2021-06-05 04:09:33,574 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 04:09:33,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:09:33,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:33,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:33,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:33,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:33,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:34,107 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:34,108 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:34,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:34,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:34,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:34,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:34,219 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:34,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:34,220 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:34,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501518268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:34,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:34,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:34,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657350117] [2021-06-05 04:09:34,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:34,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:34,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:34,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:34,244 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:34,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:34,723 INFO L93 Difference]: Finished difference Result 618 states and 1823 transitions. [2021-06-05 04:09:34,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:09:34,723 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:34,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:34,724 INFO L225 Difference]: With dead ends: 618 [2021-06-05 04:09:34,724 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 04:09:34,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 434.1ms TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:09:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 04:09:34,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 507. [2021-06-05 04:09:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-06-05 04:09:34,731 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-06-05 04:09:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:34,731 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-06-05 04:09:34,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-06-05 04:09:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:34,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:34,732 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:34,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3650 [2021-06-05 04:09:34,945 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:34,945 INFO L82 PathProgramCache]: Analyzing trace with hash -720966227, now seen corresponding path program 127 times [2021-06-05 04:09:34,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:34,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047762064] [2021-06-05 04:09:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:35,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:35,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047762064] [2021-06-05 04:09:35,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047762064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:35,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811757749] [2021-06-05 04:09:35,031 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 04:09:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:35,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:35,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:35,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:35,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:35,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:35,642 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:35,642 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:35,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:36,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:36,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:36,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:36,187 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:36,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:36,188 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:36,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811757749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:36,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:36,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:36,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746025838] [2021-06-05 04:09:36,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:36,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:36,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:36,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:36,213 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:36,838 INFO L93 Difference]: Finished difference Result 681 states and 1975 transitions. [2021-06-05 04:09:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:09:36,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:36,839 INFO L225 Difference]: With dead ends: 681 [2021-06-05 04:09:36,839 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 04:09:36,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 542.0ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:09:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 04:09:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 497. [2021-06-05 04:09:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1330645161290325) internal successors, (1554), 496 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1554 transitions. [2021-06-05 04:09:36,845 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1554 transitions. Word has length 18 [2021-06-05 04:09:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:36,845 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1554 transitions. [2021-06-05 04:09:36,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1554 transitions. [2021-06-05 04:09:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:36,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:36,848 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:37,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3742,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:37,063 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:37,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1184758385, now seen corresponding path program 128 times [2021-06-05 04:09:37,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:37,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352533625] [2021-06-05 04:09:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:37,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:37,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352533625] [2021-06-05 04:09:37,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352533625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:37,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090921404] [2021-06-05 04:09:37,151 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 04:09:37,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:37,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:37,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:37,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:37,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:37,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:37,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:37,659 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:37,659 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:37,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:37,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:37,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:37,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:37,844 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:37,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:37,845 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:37,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090921404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:37,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:37,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:37,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748519499] [2021-06-05 04:09:37,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:37,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:37,870 INFO L87 Difference]: Start difference. First operand 497 states and 1554 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:38,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:38,321 INFO L93 Difference]: Finished difference Result 595 states and 1767 transitions. [2021-06-05 04:09:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:09:38,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:38,323 INFO L225 Difference]: With dead ends: 595 [2021-06-05 04:09:38,323 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 04:09:38,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 475.2ms TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:09:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 04:09:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 498. [2021-06-05 04:09:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.132796780684105) internal successors, (1557), 497 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1557 transitions. [2021-06-05 04:09:38,328 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1557 transitions. Word has length 18 [2021-06-05 04:09:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:38,328 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1557 transitions. [2021-06-05 04:09:38,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1557 transitions. [2021-06-05 04:09:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:38,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:38,329 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:38,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:38,529 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:38,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1448223097, now seen corresponding path program 129 times [2021-06-05 04:09:38,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:38,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55401925] [2021-06-05 04:09:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:38,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:38,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55401925] [2021-06-05 04:09:38,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55401925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:38,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611075865] [2021-06-05 04:09:38,609 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 04:09:38,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:09:38,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:38,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:38,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:38,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:38,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:39,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:39,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:39,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:39,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:09:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:39,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611075865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:39,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:39,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:39,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877528308] [2021-06-05 04:09:39,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:39,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:39,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:39,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:39,122 INFO L87 Difference]: Start difference. First operand 498 states and 1557 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:39,382 INFO L93 Difference]: Finished difference Result 613 states and 1879 transitions. [2021-06-05 04:09:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:09:39,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:39,384 INFO L225 Difference]: With dead ends: 613 [2021-06-05 04:09:39,384 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 04:09:39,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 04:09:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 570. [2021-06-05 04:09:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.154657293497364) internal successors, (1795), 569 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1795 transitions. [2021-06-05 04:09:39,390 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1795 transitions. Word has length 18 [2021-06-05 04:09:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:39,390 INFO L482 AbstractCegarLoop]: Abstraction has 570 states and 1795 transitions. [2021-06-05 04:09:39,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1795 transitions. [2021-06-05 04:09:39,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:39,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:39,391 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:39,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4029 [2021-06-05 04:09:39,591 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:39,592 INFO L82 PathProgramCache]: Analyzing trace with hash -704639737, now seen corresponding path program 130 times [2021-06-05 04:09:39,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:39,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385590240] [2021-06-05 04:09:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:39,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:39,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385590240] [2021-06-05 04:09:39,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385590240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:39,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821644456] [2021-06-05 04:09:39,673 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 04:09:39,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:39,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:39,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:39,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:39,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:39,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:40,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:40,268 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:40,269 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:40,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:40,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:40,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:40,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:40,585 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:40,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:40,586 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:40,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821644456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:40,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:40,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:40,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314662046] [2021-06-05 04:09:40,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:40,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:40,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:40,614 INFO L87 Difference]: Start difference. First operand 570 states and 1795 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:41,323 INFO L93 Difference]: Finished difference Result 700 states and 2080 transitions. [2021-06-05 04:09:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:09:41,323 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:41,324 INFO L225 Difference]: With dead ends: 700 [2021-06-05 04:09:41,325 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 04:09:41,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 526.5ms TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:09:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 04:09:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 573. [2021-06-05 04:09:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.1573426573426575) internal successors, (1806), 572 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1806 transitions. [2021-06-05 04:09:41,331 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1806 transitions. Word has length 18 [2021-06-05 04:09:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:41,331 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1806 transitions. [2021-06-05 04:09:41,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1806 transitions. [2021-06-05 04:09:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:41,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:41,332 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:41,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:41,532 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:41,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash 146504395, now seen corresponding path program 131 times [2021-06-05 04:09:41,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:41,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052673758] [2021-06-05 04:09:41,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:41,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:41,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052673758] [2021-06-05 04:09:41,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052673758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:41,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24374650] [2021-06-05 04:09:41,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:09:41,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:09:41,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:41,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:41,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:41,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:41,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:42,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:42,148 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:42,149 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:42,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:42,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:42,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:42,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:42,384 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:42,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:42,385 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:42,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24374650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:42,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:42,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:42,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090096978] [2021-06-05 04:09:42,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:42,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:42,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:42,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:42,411 INFO L87 Difference]: Start difference. First operand 573 states and 1806 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:42,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:42,925 INFO L93 Difference]: Finished difference Result 692 states and 2071 transitions. [2021-06-05 04:09:42,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:09:42,925 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:42,926 INFO L225 Difference]: With dead ends: 692 [2021-06-05 04:09:42,926 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 04:09:42,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:09:42,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 04:09:42,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 591. [2021-06-05 04:09:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1627118644067798) internal successors, (1866), 590 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1866 transitions. [2021-06-05 04:09:42,935 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1866 transitions. Word has length 18 [2021-06-05 04:09:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:42,935 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1866 transitions. [2021-06-05 04:09:42,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1866 transitions. [2021-06-05 04:09:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:42,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:42,936 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:43,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4249,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:43,149 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:43,149 INFO L82 PathProgramCache]: Analyzing trace with hash 762168711, now seen corresponding path program 132 times [2021-06-05 04:09:43,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:43,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961156486] [2021-06-05 04:09:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:43,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:43,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961156486] [2021-06-05 04:09:43,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961156486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:43,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927464560] [2021-06-05 04:09:43,236 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 04:09:43,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:09:43,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:43,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:43,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:43,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:43,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:43,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:43,766 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:43,766 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:43,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:43,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:43,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:43,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:43,896 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:43,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:43,897 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:43,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927464560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:43,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:43,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:43,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107460041] [2021-06-05 04:09:43,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:43,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:43,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:43,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:43,923 INFO L87 Difference]: Start difference. First operand 591 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:44,547 INFO L93 Difference]: Finished difference Result 752 states and 2200 transitions. [2021-06-05 04:09:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:09:44,550 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:44,551 INFO L225 Difference]: With dead ends: 752 [2021-06-05 04:09:44,551 INFO L226 Difference]: Without dead ends: 730 [2021-06-05 04:09:44,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:09:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-06-05 04:09:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 593. [2021-06-05 04:09:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-05 04:09:44,558 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-05 04:09:44,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:44,558 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-05 04:09:44,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:44,558 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-05 04:09:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:44,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:44,559 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:44,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4371,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:44,759 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:44,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1627073973, now seen corresponding path program 133 times [2021-06-05 04:09:44,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:44,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874651002] [2021-06-05 04:09:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:44,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:44,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874651002] [2021-06-05 04:09:44,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874651002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:44,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471359244] [2021-06-05 04:09:44,868 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 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 04:09:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:44,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:44,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:45,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:45,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:45,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:45,423 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:45,424 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:45,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:45,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:45,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:45,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:45,609 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:45,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:45,610 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:45,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471359244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:45,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:45,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:45,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074373856] [2021-06-05 04:09:45,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:45,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:45,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:45,635 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:46,108 INFO L93 Difference]: Finished difference Result 683 states and 2069 transitions. [2021-06-05 04:09:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:09:46,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:46,109 INFO L225 Difference]: With dead ends: 683 [2021-06-05 04:09:46,109 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 04:09:46,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 501.4ms TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:09:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 04:09:46,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 593. [2021-06-05 04:09:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-05 04:09:46,115 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-05 04:09:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:46,115 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-05 04:09:46,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:46,115 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-05 04:09:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:46,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:46,116 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:46,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4478,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:46,316 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:46,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:46,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1615814151, now seen corresponding path program 134 times [2021-06-05 04:09:46,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:46,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902594786] [2021-06-05 04:09:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:46,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:46,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902594786] [2021-06-05 04:09:46,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902594786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:46,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706833487] [2021-06-05 04:09:46,420 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 04:09:46,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:46,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:46,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:46,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:46,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:46,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:46,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:46,977 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:46,978 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:46,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:47,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:47,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:47,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:47,085 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:47,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:47,086 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:47,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706833487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:47,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:47,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:47,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263395554] [2021-06-05 04:09:47,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:47,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:47,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:47,112 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:47,534 INFO L93 Difference]: Finished difference Result 681 states and 2066 transitions. [2021-06-05 04:09:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:09:47,535 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:47,536 INFO L225 Difference]: With dead ends: 681 [2021-06-05 04:09:47,536 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 04:09:47,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:09:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 04:09:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 593. [2021-06-05 04:09:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-05 04:09:47,542 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-05 04:09:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:47,542 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-05 04:09:47,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:47,542 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-05 04:09:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:47,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:47,543 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:47,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4596 [2021-06-05 04:09:47,743 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:47,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1904159473, now seen corresponding path program 135 times [2021-06-05 04:09:47,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:47,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089794450] [2021-06-05 04:09:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:47,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:47,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089794450] [2021-06-05 04:09:47,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089794450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:47,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751529644] [2021-06-05 04:09:47,834 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 04:09:47,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:09:47,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:47,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:48,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:48,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:48,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:48,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:48,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:48,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:09:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:48,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751529644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:48,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:48,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:48,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655503587] [2021-06-05 04:09:48,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:48,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:48,251 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:48,564 INFO L93 Difference]: Finished difference Result 630 states and 1927 transitions. [2021-06-05 04:09:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:09:48,565 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:48,565 INFO L225 Difference]: With dead ends: 630 [2021-06-05 04:09:48,565 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 04:09:48,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 298.9ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:09:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 04:09:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 593. [2021-06-05 04:09:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-06-05 04:09:48,571 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 18 [2021-06-05 04:09:48,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:48,571 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-06-05 04:09:48,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-06-05 04:09:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:48,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:48,572 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:48,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4692 [2021-06-05 04:09:48,777 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:48,777 INFO L82 PathProgramCache]: Analyzing trace with hash 548291531, now seen corresponding path program 136 times [2021-06-05 04:09:48,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:48,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536849114] [2021-06-05 04:09:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:48,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:48,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536849114] [2021-06-05 04:09:48,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536849114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:48,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22410237] [2021-06-05 04:09:48,878 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 04:09:48,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:48,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:48,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:49,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:49,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:49,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:49,491 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:49,491 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:49,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:49,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:49,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:49,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:49,689 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:49,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:49,690 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:49,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22410237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:49,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:49,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:49,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471036405] [2021-06-05 04:09:49,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:49,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:49,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:49,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:49,715 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:50,277 INFO L93 Difference]: Finished difference Result 747 states and 2217 transitions. [2021-06-05 04:09:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:09:50,278 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:50,278 INFO L225 Difference]: With dead ends: 747 [2021-06-05 04:09:50,278 INFO L226 Difference]: Without dead ends: 737 [2021-06-05 04:09:50,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:09:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-05 04:09:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 599. [2021-06-05 04:09:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.1538461538461537) internal successors, (1886), 598 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1886 transitions. [2021-06-05 04:09:50,285 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1886 transitions. Word has length 18 [2021-06-05 04:09:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:50,285 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1886 transitions. [2021-06-05 04:09:50,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1886 transitions. [2021-06-05 04:09:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:50,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:50,286 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:50,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4740,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:50,489 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2031426469, now seen corresponding path program 137 times [2021-06-05 04:09:50,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:50,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002919997] [2021-06-05 04:09:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:50,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:50,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002919997] [2021-06-05 04:09:50,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002919997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:50,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385694344] [2021-06-05 04:09:50,577 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 04:09:50,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:09:50,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:50,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:50,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:50,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:51,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:51,178 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:51,179 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:51,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:51,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:51,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:51,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:51,293 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:51,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:51,294 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:51,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385694344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:51,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:51,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:51,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55027868] [2021-06-05 04:09:51,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:51,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:51,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:51,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:51,319 INFO L87 Difference]: Start difference. First operand 599 states and 1886 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:51,979 INFO L93 Difference]: Finished difference Result 777 states and 2279 transitions. [2021-06-05 04:09:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:09:51,980 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:51,980 INFO L225 Difference]: With dead ends: 777 [2021-06-05 04:09:51,980 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 04:09:51,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 664.6ms TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:09:51,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 04:09:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 597. [2021-06-05 04:09:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-06-05 04:09:51,987 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-06-05 04:09:51,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:51,987 INFO L482 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-06-05 04:09:51,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:51,987 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-06-05 04:09:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:51,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:51,988 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:52,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:52,188 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:52,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:52,188 INFO L82 PathProgramCache]: Analyzing trace with hash 979347297, now seen corresponding path program 138 times [2021-06-05 04:09:52,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:52,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904620496] [2021-06-05 04:09:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:52,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:52,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904620496] [2021-06-05 04:09:52,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904620496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:52,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853151221] [2021-06-05 04:09:52,278 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 04:09:52,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:09:52,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:52,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:52,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:52,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:52,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:52,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:52,773 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:52,773 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:52,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:52,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:52,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:52,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:53,005 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:53,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:53,006 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:53,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853151221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:53,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:53,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:09:53,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216330790] [2021-06-05 04:09:53,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:09:53,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:09:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:53,031 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:53,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:53,560 INFO L93 Difference]: Finished difference Result 676 states and 2054 transitions. [2021-06-05 04:09:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:09:53,561 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:53,561 INFO L225 Difference]: With dead ends: 676 [2021-06-05 04:09:53,561 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 04:09:53,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 547.1ms TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:09:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 04:09:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 597. [2021-06-05 04:09:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-06-05 04:09:53,568 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-06-05 04:09:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:53,568 INFO L482 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-06-05 04:09:53,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-06-05 04:09:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:53,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:53,569 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:53,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4998,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:53,769 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash 942820167, now seen corresponding path program 139 times [2021-06-05 04:09:53,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:53,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140074263] [2021-06-05 04:09:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:53,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:53,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140074263] [2021-06-05 04:09:53,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140074263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:53,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681306844] [2021-06-05 04:09:53,848 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 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 04:09:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:53,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:54,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:54,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:54,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:54,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:54,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:54,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:09:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:54,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681306844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:54,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:54,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:54,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368049371] [2021-06-05 04:09:54,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:54,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:54,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:54,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:54,248 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:54,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:54,507 INFO L93 Difference]: Finished difference Result 707 states and 2181 transitions. [2021-06-05 04:09:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:09:54,508 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:54,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:54,508 INFO L225 Difference]: With dead ends: 707 [2021-06-05 04:09:54,508 INFO L226 Difference]: Without dead ends: 691 [2021-06-05 04:09:54,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-05 04:09:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 667. [2021-06-05 04:09:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.165165165165165) internal successors, (2108), 666 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2108 transitions. [2021-06-05 04:09:54,515 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2108 transitions. Word has length 18 [2021-06-05 04:09:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:54,515 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 2108 transitions. [2021-06-05 04:09:54,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:54,515 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2108 transitions. [2021-06-05 04:09:54,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:54,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:54,516 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:54,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5114,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:54,737 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1686403527, now seen corresponding path program 140 times [2021-06-05 04:09:54,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:54,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668440459] [2021-06-05 04:09:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:54,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668440459] [2021-06-05 04:09:54,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668440459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420579266] [2021-06-05 04:09:54,818 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 04:09:54,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:54,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:54,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:54,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:55,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:55,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:55,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:55,496 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:55,496 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:55,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:55,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:55,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:55,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:55,690 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:55,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:55,690 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:55,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420579266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:55,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:55,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:55,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185736021] [2021-06-05 04:09:55,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:55,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:55,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:55,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:55,718 INFO L87 Difference]: Start difference. First operand 667 states and 2108 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:56,434 INFO L93 Difference]: Finished difference Result 772 states and 2340 transitions. [2021-06-05 04:09:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:09:56,434 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:56,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:56,435 INFO L225 Difference]: With dead ends: 772 [2021-06-05 04:09:56,435 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 04:09:56,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 480.3ms TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:09:56,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 04:09:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 670. [2021-06-05 04:09:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1689088191330343) internal successors, (2120), 669 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2120 transitions. [2021-06-05 04:09:56,443 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2120 transitions. Word has length 18 [2021-06-05 04:09:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:56,443 INFO L482 AbstractCegarLoop]: Abstraction has 670 states and 2120 transitions. [2021-06-05 04:09:56,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2120 transitions. [2021-06-05 04:09:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:56,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:56,444 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:56,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5168 [2021-06-05 04:09:56,644 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:56,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:56,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1757419637, now seen corresponding path program 141 times [2021-06-05 04:09:56,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:56,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187044388] [2021-06-05 04:09:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:56,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:56,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187044388] [2021-06-05 04:09:56,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187044388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:56,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74727738] [2021-06-05 04:09:56,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:09:56,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:09:56,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:56,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:56,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:57,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:57,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:57,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:57,355 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:57,355 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:57,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:57,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:57,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:57,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:57,594 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:57,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:57,594 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:57,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74727738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:57,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:57,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:57,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654301900] [2021-06-05 04:09:57,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:57,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:57,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:57,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:57,620 INFO L87 Difference]: Start difference. First operand 670 states and 2120 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:58,263 INFO L93 Difference]: Finished difference Result 788 states and 2394 transitions. [2021-06-05 04:09:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:09:58,263 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:58,265 INFO L225 Difference]: With dead ends: 788 [2021-06-05 04:09:58,265 INFO L226 Difference]: Without dead ends: 778 [2021-06-05 04:09:58,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:09:58,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-06-05 04:09:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 695. [2021-06-05 04:09:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.1714697406340058) internal successors, (2201), 694 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2201 transitions. [2021-06-05 04:09:58,273 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2201 transitions. Word has length 18 [2021-06-05 04:09:58,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:58,273 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2201 transitions. [2021-06-05 04:09:58,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2201 transitions. [2021-06-05 04:09:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:58,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:58,274 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:58,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5316 [2021-06-05 04:09:58,474 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:58,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1141755321, now seen corresponding path program 142 times [2021-06-05 04:09:58,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:58,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58395085] [2021-06-05 04:09:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:58,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:58,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58395085] [2021-06-05 04:09:58,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58395085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:58,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73758045] [2021-06-05 04:09:58,552 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 04:09:58,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:58,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:58,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:09:58,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:58,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:58,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:09:58,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:59,118 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:09:59,119 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:09:59,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:09:59,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:09:59,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:09:59,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:59,244 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:09:59,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:09:59,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:09:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:59,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73758045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:59,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:59,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:09:59,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971650615] [2021-06-05 04:09:59,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:59,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:59,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:59,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:59,270 INFO L87 Difference]: Start difference. First operand 695 states and 2201 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:59,754 INFO L93 Difference]: Finished difference Result 836 states and 2495 transitions. [2021-06-05 04:09:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:09:59,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:09:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:59,755 INFO L225 Difference]: With dead ends: 836 [2021-06-05 04:09:59,755 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 04:09:59,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:09:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 04:09:59,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 705. [2021-06-05 04:09:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.171875) internal successors, (2233), 704 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2233 transitions. [2021-06-05 04:09:59,762 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2233 transitions. Word has length 18 [2021-06-05 04:09:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:59,762 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2233 transitions. [2021-06-05 04:09:59,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2233 transitions. [2021-06-05 04:09:59,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:09:59,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:59,763 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:59,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5417,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:59,964 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:59,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:59,964 INFO L82 PathProgramCache]: Analyzing trace with hash 763969291, now seen corresponding path program 143 times [2021-06-05 04:09:59,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:59,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036356356] [2021-06-05 04:09:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:00,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:00,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036356356] [2021-06-05 04:10:00,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036356356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:00,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027345676] [2021-06-05 04:10:00,062 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 04:10:00,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:10:00,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:00,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:00,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:00,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:00,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:00,553 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:00,554 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:00,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:00,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:00,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:00,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:00,879 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:00,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:00,880 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:00,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027345676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:00,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:00,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:10:00,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343216574] [2021-06-05 04:10:00,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:00,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:00,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:00,910 INFO L87 Difference]: Start difference. First operand 705 states and 2233 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:01,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:01,649 INFO L93 Difference]: Finished difference Result 890 states and 2620 transitions. [2021-06-05 04:10:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:10:01,650 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:01,651 INFO L225 Difference]: With dead ends: 890 [2021-06-05 04:10:01,651 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 04:10:01,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 697.9ms TimeCoverageRelationStatistics Valid=286, Invalid=1876, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:10:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 04:10:01,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 705. [2021-06-05 04:10:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-05 04:10:01,658 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-05 04:10:01,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:01,659 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-05 04:10:01,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-05 04:10:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:01,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:01,659 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:01,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5511,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:01,860 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:01,860 INFO L82 PathProgramCache]: Analyzing trace with hash -288109881, now seen corresponding path program 144 times [2021-06-05 04:10:01,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:01,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237149289] [2021-06-05 04:10:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:01,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:01,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237149289] [2021-06-05 04:10:01,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237149289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:01,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415975240] [2021-06-05 04:10:01,948 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 04:10:01,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:10:01,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:01,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:01,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:02,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:02,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:02,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:02,672 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:02,672 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:02,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:02,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:02,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:02,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:02,795 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:02,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:02,795 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:02,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415975240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:02,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:02,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:10:02,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811285338] [2021-06-05 04:10:02,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:02,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:02,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:02,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:02,822 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:03,329 INFO L93 Difference]: Finished difference Result 803 states and 2447 transitions. [2021-06-05 04:10:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:10:03,329 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:03,331 INFO L225 Difference]: With dead ends: 803 [2021-06-05 04:10:03,331 INFO L226 Difference]: Without dead ends: 798 [2021-06-05 04:10:03,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 554.2ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:10:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-06-05 04:10:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 705. [2021-06-05 04:10:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-05 04:10:03,338 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-05 04:10:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:03,338 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-05 04:10:03,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-05 04:10:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:03,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:03,339 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:03,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5650 [2021-06-05 04:10:03,541 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:03,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:03,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1457174155, now seen corresponding path program 145 times [2021-06-05 04:10:03,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:03,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989456206] [2021-06-05 04:10:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:03,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:03,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989456206] [2021-06-05 04:10:03,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989456206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:03,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363595319] [2021-06-05 04:10:03,635 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 04:10:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:03,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:03,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:03,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:03,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:04,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:04,361 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:04,361 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:04,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:04,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:04,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:04,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:04,499 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:04,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:04,500 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:04,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363595319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:04,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:04,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:10:04,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856142484] [2021-06-05 04:10:04,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:04,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:04,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:04,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:04,526 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:05,061 INFO L93 Difference]: Finished difference Result 813 states and 2474 transitions. [2021-06-05 04:10:05,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:10:05,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:05,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:05,062 INFO L225 Difference]: With dead ends: 813 [2021-06-05 04:10:05,062 INFO L226 Difference]: Without dead ends: 808 [2021-06-05 04:10:05,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:10:05,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-06-05 04:10:05,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 705. [2021-06-05 04:10:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-05 04:10:05,069 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-05 04:10:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:05,069 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-05 04:10:05,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-05 04:10:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:05,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:05,070 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:05,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5778,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:05,271 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:05,271 INFO L82 PathProgramCache]: Analyzing trace with hash -646443817, now seen corresponding path program 146 times [2021-06-05 04:10:05,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:05,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320814308] [2021-06-05 04:10:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:05,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:05,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320814308] [2021-06-05 04:10:05,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320814308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:05,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782602564] [2021-06-05 04:10:05,360 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 04:10:05,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:05,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:05,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:05,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:05,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:05,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:05,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:05,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:05,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:10:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:05,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782602564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:05,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:05,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:10:05,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415086017] [2021-06-05 04:10:05,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:05,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:05,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:05,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:05,791 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:06,122 INFO L93 Difference]: Finished difference Result 751 states and 2311 transitions. [2021-06-05 04:10:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:10:06,122 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:06,123 INFO L225 Difference]: With dead ends: 751 [2021-06-05 04:10:06,123 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 04:10:06,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:10:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 04:10:06,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 705. [2021-06-05 04:10:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-06-05 04:10:06,130 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-06-05 04:10:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:06,130 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-06-05 04:10:06,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-06-05 04:10:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:06,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:06,131 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:06,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5939 [2021-06-05 04:10:06,332 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1571255993, now seen corresponding path program 147 times [2021-06-05 04:10:06,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:06,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222574976] [2021-06-05 04:10:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:06,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:06,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222574976] [2021-06-05 04:10:06,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222574976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:06,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831118635] [2021-06-05 04:10:06,419 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 04:10:06,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:10:06,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:06,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:06,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:06,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:06,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:06,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:06,936 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:06,937 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:06,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:07,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:07,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:07,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:07,348 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:07,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:07,348 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:07,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831118635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:07,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:07,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:10:07,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014776991] [2021-06-05 04:10:07,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:07,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:07,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:07,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:07,374 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:08,101 INFO L93 Difference]: Finished difference Result 846 states and 2546 transitions. [2021-06-05 04:10:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:10:08,101 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:08,102 INFO L225 Difference]: With dead ends: 846 [2021-06-05 04:10:08,102 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 04:10:08,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 702.4ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:10:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 04:10:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 705. [2021-06-05 04:10:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-06-05 04:10:08,110 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-06-05 04:10:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:08,110 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-06-05 04:10:08,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-06-05 04:10:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:08,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:08,111 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:08,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5997,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:08,311 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:08,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1456254125, now seen corresponding path program 148 times [2021-06-05 04:10:08,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:08,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311389039] [2021-06-05 04:10:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:08,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:08,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311389039] [2021-06-05 04:10:08,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311389039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:08,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332853959] [2021-06-05 04:10:08,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:10:08,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:08,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:08,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:08,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:08,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:08,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:08,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:09,047 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:09,047 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:09,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:09,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:09,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:09,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:09,257 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:09,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:09,257 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:09,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332853959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:09,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:09,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:10:09,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424673394] [2021-06-05 04:10:09,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:09,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:09,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:09,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:09,283 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:10,077 INFO L93 Difference]: Finished difference Result 871 states and 2573 transitions. [2021-06-05 04:10:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:10:10,077 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:10,078 INFO L225 Difference]: With dead ends: 871 [2021-06-05 04:10:10,078 INFO L226 Difference]: Without dead ends: 856 [2021-06-05 04:10:10,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 784.1ms TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:10:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-05 04:10:10,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 706. [2021-06-05 04:10:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-06-05 04:10:10,085 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-06-05 04:10:10,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:10,086 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-06-05 04:10:10,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-06-05 04:10:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:10,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:10,086 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:10,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6137,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:10,287 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:10,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:10,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1093429135, now seen corresponding path program 149 times [2021-06-05 04:10:10,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:10,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220171013] [2021-06-05 04:10:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:10,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220171013] [2021-06-05 04:10:10,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220171013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666716690] [2021-06-05 04:10:10,382 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 04:10:10,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:10:10,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:10,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:10,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:10,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:10,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:10,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:10,896 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:10,897 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:10,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:11,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:11,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:11,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:11,079 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:11,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:11,080 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:11,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666716690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:11,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:11,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:10:11,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973504906] [2021-06-05 04:10:11,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:11,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:11,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:11,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:11,106 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:11,736 INFO L93 Difference]: Finished difference Result 805 states and 2457 transitions. [2021-06-05 04:10:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:10:11,736 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:11,737 INFO L225 Difference]: With dead ends: 805 [2021-06-05 04:10:11,737 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 04:10:11,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 627.7ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:10:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 04:10:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 706. [2021-06-05 04:10:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-06-05 04:10:11,744 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-06-05 04:10:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:11,744 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-06-05 04:10:11,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-06-05 04:10:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:11,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:11,745 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:11,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6299 [2021-06-05 04:10:11,945 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:11,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:11,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2050717319, now seen corresponding path program 150 times [2021-06-05 04:10:11,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:11,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717749811] [2021-06-05 04:10:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:12,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:12,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717749811] [2021-06-05 04:10:12,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717749811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:12,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375073967] [2021-06-05 04:10:12,033 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 04:10:12,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:10:12,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:12,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:12,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:12,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:12,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:12,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:12,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:12,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:12,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:10:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:12,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375073967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:12,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:12,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:10:12,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505609069] [2021-06-05 04:10:12,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:10:12,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:10:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:10:12,399 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:12,694 INFO L93 Difference]: Finished difference Result 817 states and 2547 transitions. [2021-06-05 04:10:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:10:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:12,695 INFO L225 Difference]: With dead ends: 817 [2021-06-05 04:10:12,695 INFO L226 Difference]: Without dead ends: 803 [2021-06-05 04:10:12,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:10:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-06-05 04:10:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 780. [2021-06-05 04:10:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.184852374839538) internal successors, (2481), 779 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2481 transitions. [2021-06-05 04:10:12,703 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2481 transitions. Word has length 18 [2021-06-05 04:10:12,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:12,703 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2481 transitions. [2021-06-05 04:10:12,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2481 transitions. [2021-06-05 04:10:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:12,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:12,704 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:12,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6402,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:12,905 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:12,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:12,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1500666617, now seen corresponding path program 151 times [2021-06-05 04:10:12,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:12,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501106407] [2021-06-05 04:10:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:12,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:12,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501106407] [2021-06-05 04:10:12,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501106407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:12,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477181955] [2021-06-05 04:10:12,994 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 04:10:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:13,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:13,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:13,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:13,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:13,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:13,624 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:13,624 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:13,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:13,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:13,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:13,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:13,780 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:13,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:13,781 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:13,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477181955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:13,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:13,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:10:13,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967133142] [2021-06-05 04:10:13,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:10:13,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:13,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:10:13,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:10:13,808 INFO L87 Difference]: Start difference. First operand 780 states and 2481 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:14,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:14,484 INFO L93 Difference]: Finished difference Result 881 states and 2702 transitions. [2021-06-05 04:10:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:10:14,484 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:14,485 INFO L225 Difference]: With dead ends: 881 [2021-06-05 04:10:14,485 INFO L226 Difference]: Without dead ends: 871 [2021-06-05 04:10:14,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 530.1ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:10:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-06-05 04:10:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 783. [2021-06-05 04:10:14,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.187979539641944) internal successors, (2493), 782 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2493 transitions. [2021-06-05 04:10:14,494 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2493 transitions. Word has length 18 [2021-06-05 04:10:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:14,494 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2493 transitions. [2021-06-05 04:10:14,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2493 transitions. [2021-06-05 04:10:14,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:14,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:14,495 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:14,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6446,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:14,696 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:14,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:14,696 INFO L82 PathProgramCache]: Analyzing trace with hash -649522485, now seen corresponding path program 152 times [2021-06-05 04:10:14,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:14,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877497211] [2021-06-05 04:10:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:14,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:14,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877497211] [2021-06-05 04:10:14,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877497211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:14,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810861175] [2021-06-05 04:10:14,780 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 04:10:14,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:14,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:14,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:14,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:15,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:15,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:15,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:15,387 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:15,387 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:15,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:15,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:15,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:15,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:15,701 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:15,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:15,701 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:15,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810861175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:15,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:15,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:10:15,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730732672] [2021-06-05 04:10:15,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:10:15,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:15,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:10:15,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:10:15,727 INFO L87 Difference]: Start difference. First operand 783 states and 2493 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:16,368 INFO L93 Difference]: Finished difference Result 914 states and 2779 transitions. [2021-06-05 04:10:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:10:16,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:16,369 INFO L225 Difference]: With dead ends: 914 [2021-06-05 04:10:16,369 INFO L226 Difference]: Without dead ends: 904 [2021-06-05 04:10:16,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 506.4ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:10:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-05 04:10:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 808. [2021-06-05 04:10:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.195786864931846) internal successors, (2579), 807 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2579 transitions. [2021-06-05 04:10:16,378 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2579 transitions. Word has length 18 [2021-06-05 04:10:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:16,378 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2579 transitions. [2021-06-05 04:10:16,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2579 transitions. [2021-06-05 04:10:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:16,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:16,379 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:16,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6564 [2021-06-05 04:10:16,579 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:16,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:16,579 INFO L82 PathProgramCache]: Analyzing trace with hash -33858169, now seen corresponding path program 153 times [2021-06-05 04:10:16,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:16,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139400270] [2021-06-05 04:10:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:16,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:16,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139400270] [2021-06-05 04:10:16,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139400270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:16,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038508457] [2021-06-05 04:10:16,661 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 04:10:16,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:10:16,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:16,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:16,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:16,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:16,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:17,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:17,245 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:17,246 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:17,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:17,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:17,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:17,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:17,381 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:17,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:17,382 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:17,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038508457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:17,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:17,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:10:17,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901855117] [2021-06-05 04:10:17,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:10:17,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:17,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:10:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:10:17,407 INFO L87 Difference]: Start difference. First operand 808 states and 2579 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:18,135 INFO L93 Difference]: Finished difference Result 960 states and 2894 transitions. [2021-06-05 04:10:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:10:18,135 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:18,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:18,136 INFO L225 Difference]: With dead ends: 960 [2021-06-05 04:10:18,136 INFO L226 Difference]: Without dead ends: 950 [2021-06-05 04:10:18,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 544.6ms TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:10:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-06-05 04:10:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 829. [2021-06-05 04:10:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.1956521739130435) internal successors, (2646), 828 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2646 transitions. [2021-06-05 04:10:18,145 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2646 transitions. Word has length 18 [2021-06-05 04:10:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:18,145 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2646 transitions. [2021-06-05 04:10:18,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2646 transitions. [2021-06-05 04:10:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:18,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:18,146 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:18,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6715,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:18,349 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:18,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:18,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1871866443, now seen corresponding path program 154 times [2021-06-05 04:10:18,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:18,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364707696] [2021-06-05 04:10:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:18,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:18,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364707696] [2021-06-05 04:10:18,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364707696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:18,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841632676] [2021-06-05 04:10:18,432 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 04:10:18,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:18,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:18,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:18,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:18,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:18,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:18,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:18,962 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:18,962 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:18,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:19,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:19,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:19,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:19,258 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:19,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:19,258 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:19,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841632676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:19,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:19,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 04:10:19,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529362649] [2021-06-05 04:10:19,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:10:19,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:10:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:10:19,284 INFO L87 Difference]: Start difference. First operand 829 states and 2646 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:19,880 INFO L93 Difference]: Finished difference Result 966 states and 2916 transitions. [2021-06-05 04:10:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:10:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:19,881 INFO L225 Difference]: With dead ends: 966 [2021-06-05 04:10:19,881 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 04:10:19,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 584.8ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:10:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 04:10:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 835. [2021-06-05 04:10:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-05 04:10:19,890 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-05 04:10:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:19,890 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-05 04:10:19,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:19,890 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-05 04:10:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:19,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:19,891 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:20,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6814,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:20,091 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:20,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:20,091 INFO L82 PathProgramCache]: Analyzing trace with hash 819787271, now seen corresponding path program 155 times [2021-06-05 04:10:20,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:20,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658430910] [2021-06-05 04:10:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:20,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:20,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658430910] [2021-06-05 04:10:20,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658430910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:20,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137385178] [2021-06-05 04:10:20,180 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 04:10:20,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:10:20,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:20,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:20,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:20,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:20,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:20,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:20,766 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:20,766 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:20,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:20,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:20,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:20,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:20,905 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:20,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:20,906 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:20,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137385178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:20,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:20,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:10:20,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267096094] [2021-06-05 04:10:20,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:20,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:20,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:20,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:20,932 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:21,700 INFO L93 Difference]: Finished difference Result 1010 states and 3017 transitions. [2021-06-05 04:10:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:10:21,700 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:21,701 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 04:10:21,701 INFO L226 Difference]: Without dead ends: 995 [2021-06-05 04:10:21,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 761.7ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:10:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-06-05 04:10:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 835. [2021-06-05 04:10:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-05 04:10:21,713 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-05 04:10:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:21,713 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-05 04:10:21,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-05 04:10:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:21,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:21,715 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:21,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6954 [2021-06-05 04:10:21,937 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:21,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1729895989, now seen corresponding path program 156 times [2021-06-05 04:10:21,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:21,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19703793] [2021-06-05 04:10:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:22,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:22,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19703793] [2021-06-05 04:10:22,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19703793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:22,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984802294] [2021-06-05 04:10:22,024 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 04:10:22,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:10:22,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:22,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:22,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:22,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:22,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:22,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:22,739 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:22,740 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:22,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:22,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:22,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:22,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:22,901 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:22,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:22,902 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:22,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984802294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:22,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:22,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:10:22,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371318590] [2021-06-05 04:10:22,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:22,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:22,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:22,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:22,929 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:23,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:23,566 INFO L93 Difference]: Finished difference Result 964 states and 2957 transitions. [2021-06-05 04:10:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:10:23,566 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:23,567 INFO L225 Difference]: With dead ends: 964 [2021-06-05 04:10:23,567 INFO L226 Difference]: Without dead ends: 959 [2021-06-05 04:10:23,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 649.2ms TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:10:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-06-05 04:10:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 835. [2021-06-05 04:10:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-05 04:10:23,576 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-05 04:10:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:23,576 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-05 04:10:23,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-05 04:10:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:10:23,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:23,577 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:23,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7060,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:23,778 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:23,778 INFO L82 PathProgramCache]: Analyzing trace with hash 834301575, now seen corresponding path program 157 times [2021-06-05 04:10:23,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:23,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151404385] [2021-06-05 04:10:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:23,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:23,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151404385] [2021-06-05 04:10:23,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151404385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:23,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399638596] [2021-06-05 04:10:23,881 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 04:10:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:23,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 04:10:23,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:24,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:24,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:10:24,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:24,573 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:10:24,573 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 04:10:24,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 04:10:24,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:24,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:24,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:24,816 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:10:24,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:24,817 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 04:10:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:24,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399638596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:24,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:24,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:10:24,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314440300] [2021-06-05 04:10:24,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:24,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:24,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:24,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:24,843 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:25,423 INFO L93 Difference]: Finished difference Result 980 states and 3003 transitions. [2021-06-05 04:10:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:10:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:10:25,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:25,425 INFO L225 Difference]: With dead ends: 980 [2021-06-05 04:10:25,425 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 04:10:25,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 713.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:10:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 04:10:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 837. [2021-06-05 04:10:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.187799043062201) internal successors, (2665), 836 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2665 transitions. [2021-06-05 04:10:25,434 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2665 transitions. Word has length 18 [2021-06-05 04:10:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:25,434 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2665 transitions. [2021-06-05 04:10:25,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:25,434 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2665 transitions. [2021-06-05 04:10:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:10:25,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:25,435 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:25,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7192,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:25,636 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:25,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1301661189, now seen corresponding path program 158 times [2021-06-05 04:10:25,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:25,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765193025] [2021-06-05 04:10:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:25,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:25,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765193025] [2021-06-05 04:10:25,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765193025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:25,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354639793] [2021-06-05 04:10:25,757 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 04:10:25,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:25,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:25,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:10:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:26,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:26,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:10:26,607 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 224 [2021-06-05 04:10:27,234 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 260 [2021-06-05 04:10:27,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:27,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:27,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:27,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:10:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:27,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354639793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:27,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:27,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:10:27,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699918366] [2021-06-05 04:10:27,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:10:27,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:27,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:10:27,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:10:27,753 INFO L87 Difference]: Start difference. First operand 837 states and 2665 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:10:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:28,047 INFO L93 Difference]: Finished difference Result 905 states and 2785 transitions. [2021-06-05 04:10:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:10:28,048 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:10:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:28,049 INFO L225 Difference]: With dead ends: 905 [2021-06-05 04:10:28,049 INFO L226 Difference]: Without dead ends: 883 [2021-06-05 04:10:28,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:10:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-06-05 04:10:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 840. [2021-06-05 04:10:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.1835518474374256) internal successors, (2671), 839 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2671 transitions. [2021-06-05 04:10:28,057 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2671 transitions. Word has length 19 [2021-06-05 04:10:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:28,057 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2671 transitions. [2021-06-05 04:10:28,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:10:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2671 transitions. [2021-06-05 04:10:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:10:28,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:28,058 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:28,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7314,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:28,259 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:28,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:28,259 INFO L82 PathProgramCache]: Analyzing trace with hash -649128821, now seen corresponding path program 159 times [2021-06-05 04:10:28,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:28,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478784225] [2021-06-05 04:10:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:28,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:28,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478784225] [2021-06-05 04:10:28,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478784225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:28,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324787385] [2021-06-05 04:10:28,381 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 04:10:28,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:10:28,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:28,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 04:10:28,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:28,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:28,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:10:29,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:29,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:29,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:29,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:10:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:29,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324787385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:29,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:29,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:10:29,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264584081] [2021-06-05 04:10:29,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:10:29,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:10:29,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:10:29,159 INFO L87 Difference]: Start difference. First operand 840 states and 2671 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:10:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:29,602 INFO L93 Difference]: Finished difference Result 899 states and 2774 transitions. [2021-06-05 04:10:29,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:10:29,602 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:10:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:29,604 INFO L225 Difference]: With dead ends: 899 [2021-06-05 04:10:29,604 INFO L226 Difference]: Without dead ends: 880 [2021-06-05 04:10:29,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 424.0ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:10:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-06-05 04:10:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 842. [2021-06-05 04:10:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.1712247324613556) internal successors, (2667), 841 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2667 transitions. [2021-06-05 04:10:29,613 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2667 transitions. Word has length 19 [2021-06-05 04:10:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:29,613 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2667 transitions. [2021-06-05 04:10:29,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:10:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2667 transitions. [2021-06-05 04:10:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:10:29,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:29,614 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:29,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7594,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:29,815 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:29,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:29,815 INFO L82 PathProgramCache]: Analyzing trace with hash 203204603, now seen corresponding path program 160 times [2021-06-05 04:10:29,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:29,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041767606] [2021-06-05 04:10:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:29,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:29,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041767606] [2021-06-05 04:10:29,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041767606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:29,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449581449] [2021-06-05 04:10:29,945 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 04:10:29,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:29,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:29,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:10:29,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:30,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:30,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:10:30,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:30,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:30,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:30,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:10:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:30,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449581449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:30,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:30,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:10:30,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907755512] [2021-06-05 04:10:30,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:10:30,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:30,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:10:30,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:10:30,981 INFO L87 Difference]: Start difference. First operand 842 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:10:31,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:31,359 INFO L93 Difference]: Finished difference Result 889 states and 2752 transitions. [2021-06-05 04:10:31,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:10:31,359 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:10:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:31,360 INFO L225 Difference]: With dead ends: 889 [2021-06-05 04:10:31,360 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 04:10:31,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:10:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 04:10:31,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 843. [2021-06-05 04:10:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.16270783847981) internal successors, (2663), 842 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2663 transitions. [2021-06-05 04:10:31,369 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2663 transitions. Word has length 19 [2021-06-05 04:10:31,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:31,369 INFO L482 AbstractCegarLoop]: Abstraction has 843 states and 2663 transitions. [2021-06-05 04:10:31,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:10:31,369 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2663 transitions. [2021-06-05 04:10:31,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:10:31,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:31,370 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:31,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7704 [2021-06-05 04:10:31,570 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:31,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:31,571 INFO L82 PathProgramCache]: Analyzing trace with hash 946787963, now seen corresponding path program 161 times [2021-06-05 04:10:31,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:31,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496313586] [2021-06-05 04:10:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:31,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:31,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496313586] [2021-06-05 04:10:31,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496313586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:31,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797424616] [2021-06-05 04:10:31,716 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 04:10:31,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:10:31,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:31,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:10:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:32,074 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 04:10:32,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:32,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:10:33,530 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 210 [2021-06-05 04:10:34,471 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 258 [2021-06-05 04:10:34,603 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 277 [2021-06-05 04:10:34,768 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 302 [2021-06-05 04:10:35,115 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 419 [2021-06-05 04:10:35,578 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 519 [2021-06-05 04:10:36,041 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 519 [2021-06-05 04:10:36,550 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 526 [2021-06-05 04:10:36,736 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 236 [2021-06-05 04:10:37,844 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 233 [2021-06-05 04:10:37,954 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 233 [2021-06-05 04:10:38,105 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 214 [2021-06-05 04:10:38,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:38,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:38,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:10:38,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:38,641 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:10:38,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:38,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:10:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:38,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797424616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:38,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:38,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:10:38,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139236472] [2021-06-05 04:10:38,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:10:38,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:38,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:10:38,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:10:38,674 INFO L87 Difference]: Start difference. First operand 843 states and 2663 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:10:39,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:39,115 INFO L93 Difference]: Finished difference Result 922 states and 2811 transitions. [2021-06-05 04:10:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:10:39,116 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:10:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:39,117 INFO L225 Difference]: With dead ends: 922 [2021-06-05 04:10:39,117 INFO L226 Difference]: Without dead ends: 910 [2021-06-05 04:10:39,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 406.8ms TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:10:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-05 04:10:39,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 839. [2021-06-05 04:10:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.1658711217183773) internal successors, (2653), 838 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2653 transitions. [2021-06-05 04:10:39,126 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2653 transitions. Word has length 19 [2021-06-05 04:10:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:39,126 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2653 transitions. [2021-06-05 04:10:39,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:10:39,126 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2653 transitions. [2021-06-05 04:10:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:10:39,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:39,127 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:39,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7885 [2021-06-05 04:10:39,328 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:39,328 INFO L82 PathProgramCache]: Analyzing trace with hash 274927871, now seen corresponding path program 162 times [2021-06-05 04:10:39,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:39,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739000859] [2021-06-05 04:10:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:39,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:39,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739000859] [2021-06-05 04:10:39,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739000859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:39,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366864895] [2021-06-05 04:10:39,450 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 04:10:39,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:10:39,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:39,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:10:39,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:39,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:39,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:10:40,722 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 251 [2021-06-05 04:10:40,950 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 424 [2021-06-05 04:10:41,134 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 424 [2021-06-05 04:10:41,374 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 435 [2021-06-05 04:10:42,140 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 488 [2021-06-05 04:10:42,329 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 323 [2021-06-05 04:10:43,761 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 330 [2021-06-05 04:10:43,868 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 283 [2021-06-05 04:10:45,036 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 479 [2021-06-05 04:10:45,497 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 629 [2021-06-05 04:10:45,964 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 629 [2021-06-05 04:10:46,469 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 634 [2021-06-05 04:10:46,874 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 534 [2021-06-05 04:10:47,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:47,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:47,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:10:48,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:48,282 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:10:48,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:48,283 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:10:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:48,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366864895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:48,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:48,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:10:48,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297987385] [2021-06-05 04:10:48,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:10:48,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:48,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:10:48,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:10:48,312 INFO L87 Difference]: Start difference. First operand 839 states and 2653 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:48,827 INFO L93 Difference]: Finished difference Result 960 states and 2881 transitions. [2021-06-05 04:10:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:10:48,827 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:10:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:48,828 INFO L225 Difference]: With dead ends: 960 [2021-06-05 04:10:48,828 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 04:10:48,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:10:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 04:10:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 844. [2021-06-05 04:10:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.1589561091340452) internal successors, (2663), 843 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2663 transitions. [2021-06-05 04:10:48,837 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2663 transitions. Word has length 19 [2021-06-05 04:10:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:48,837 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2663 transitions. [2021-06-05 04:10:48,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2663 transitions. [2021-06-05 04:10:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:10:48,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:48,838 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:49,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8577 [2021-06-05 04:10:49,039 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:49,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:49,039 INFO L82 PathProgramCache]: Analyzing trace with hash -386335912, now seen corresponding path program 163 times [2021-06-05 04:10:49,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:49,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380422692] [2021-06-05 04:10:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:49,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:49,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380422692] [2021-06-05 04:10:49,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380422692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:49,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736328949] [2021-06-05 04:10:49,080 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 04:10:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:49,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:10:49,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:49,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736328949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:49,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:49,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:10:49,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738897928] [2021-06-05 04:10:49,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:10:49,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:49,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:10:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:10:49,138 INFO L87 Difference]: Start difference. First operand 844 states and 2663 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:49,191 INFO L93 Difference]: Finished difference Result 1106 states and 3133 transitions. [2021-06-05 04:10:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:10:49,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:10:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:49,192 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 04:10:49,192 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 04:10:49,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:10:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 04:10:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 852. [2021-06-05 04:10:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.1656874265569916) internal successors, (2694), 851 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2694 transitions. [2021-06-05 04:10:49,201 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2694 transitions. Word has length 19 [2021-06-05 04:10:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:49,202 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2694 transitions. [2021-06-05 04:10:49,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2694 transitions. [2021-06-05 04:10:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:10:49,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:49,203 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:49,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9440,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:49,417 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:49,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1288290309, now seen corresponding path program 164 times [2021-06-05 04:10:49,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:49,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434310541] [2021-06-05 04:10:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:49,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:49,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434310541] [2021-06-05 04:10:49,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434310541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:49,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833526516] [2021-06-05 04:10:49,531 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 04:10:49,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:49,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:49,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:10:49,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:49,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:49,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:10:50,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:50,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:50,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:50,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:10:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:50,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833526516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:50,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:50,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:10:50,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3448549] [2021-06-05 04:10:50,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:50,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:50,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:50,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:50,262 INFO L87 Difference]: Start difference. First operand 852 states and 2694 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:50,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:50,599 INFO L93 Difference]: Finished difference Result 911 states and 2818 transitions. [2021-06-05 04:10:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:10:50,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:10:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:50,600 INFO L225 Difference]: With dead ends: 911 [2021-06-05 04:10:50,600 INFO L226 Difference]: Without dead ends: 900 [2021-06-05 04:10:50,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:10:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-06-05 04:10:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 856. [2021-06-05 04:10:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.160233918128655) internal successors, (2702), 855 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2702 transitions. [2021-06-05 04:10:50,613 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2702 transitions. Word has length 19 [2021-06-05 04:10:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:50,613 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2702 transitions. [2021-06-05 04:10:50,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:50,613 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2702 transitions. [2021-06-05 04:10:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:10:50,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:50,614 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:50,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9441 [2021-06-05 04:10:50,837 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:50,837 INFO L82 PathProgramCache]: Analyzing trace with hash -544706949, now seen corresponding path program 165 times [2021-06-05 04:10:50,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:50,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888609179] [2021-06-05 04:10:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:50,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:50,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888609179] [2021-06-05 04:10:50,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888609179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:50,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920364218] [2021-06-05 04:10:50,939 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 04:10:50,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:10:50,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:50,966 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:10:50,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:51,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:51,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:10:52,733 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 334 [2021-06-05 04:10:53,869 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 443 [2021-06-05 04:10:54,180 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 463 [2021-06-05 04:10:54,495 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 463 [2021-06-05 04:10:54,854 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 731 DAG size of output: 470 [2021-06-05 04:10:55,256 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 525 [2021-06-05 04:10:55,574 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 504 [2021-06-05 04:10:56,050 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 259 [2021-06-05 04:10:56,254 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 288 [2021-06-05 04:10:56,458 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 334 [2021-06-05 04:10:56,628 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 334 [2021-06-05 04:10:56,744 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 223 [2021-06-05 04:10:56,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:56,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:56,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:10:57,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:57,307 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:10:57,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:57,307 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:10:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:57,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920364218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:57,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:57,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:10:57,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425541176] [2021-06-05 04:10:57,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:10:57,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:10:57,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:57,338 INFO L87 Difference]: Start difference. First operand 856 states and 2702 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:57,800 INFO L93 Difference]: Finished difference Result 946 states and 2880 transitions. [2021-06-05 04:10:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:10:57,801 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:10:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:57,802 INFO L225 Difference]: With dead ends: 946 [2021-06-05 04:10:57,802 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 04:10:57,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:10:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 04:10:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 858. [2021-06-05 04:10:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.156359393232205) internal successors, (2705), 857 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2705 transitions. [2021-06-05 04:10:57,811 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2705 transitions. Word has length 19 [2021-06-05 04:10:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:57,811 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2705 transitions. [2021-06-05 04:10:57,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2705 transitions. [2021-06-05 04:10:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:10:57,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:57,812 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:58,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9533 [2021-06-05 04:10:58,013 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:58,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:58,013 INFO L82 PathProgramCache]: Analyzing trace with hash 306437183, now seen corresponding path program 166 times [2021-06-05 04:10:58,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:58,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822448972] [2021-06-05 04:10:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:58,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:58,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822448972] [2021-06-05 04:10:58,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822448972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:58,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444205172] [2021-06-05 04:10:58,164 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:58,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:58,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:58,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:10:58,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:58,533 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 04:10:58,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:58,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:00,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:00,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:00,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:01,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:01,070 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:01,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:01,071 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:01,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444205172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:01,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:01,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:11:01,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186454940] [2021-06-05 04:11:01,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:11:01,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:01,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:11:01,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:01,100 INFO L87 Difference]: Start difference. First operand 858 states and 2705 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:01,653 INFO L93 Difference]: Finished difference Result 1017 states and 3020 transitions. [2021-06-05 04:11:01,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:11:01,654 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:01,655 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 04:11:01,655 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 04:11:01,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:11:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 04:11:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 867. [2021-06-05 04:11:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.147806004618938) internal successors, (2726), 866 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2726 transitions. [2021-06-05 04:11:01,664 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2726 transitions. Word has length 19 [2021-06-05 04:11:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:01,664 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2726 transitions. [2021-06-05 04:11:01,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2726 transitions. [2021-06-05 04:11:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:01,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:01,665 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:01,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10224 [2021-06-05 04:11:01,866 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:01,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:01,866 INFO L82 PathProgramCache]: Analyzing trace with hash 922101499, now seen corresponding path program 167 times [2021-06-05 04:11:01,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:01,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27593080] [2021-06-05 04:11:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:02,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:02,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27593080] [2021-06-05 04:11:02,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27593080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:02,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023570928] [2021-06-05 04:11:02,004 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:02,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:11:02,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:02,031 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:02,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:02,380 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 04:11:02,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:02,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:03,038 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 323 [2021-06-05 04:11:03,143 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 333 [2021-06-05 04:11:03,246 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 333 [2021-06-05 04:11:03,371 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 344 [2021-06-05 04:11:03,547 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 379 [2021-06-05 04:11:03,667 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 336 [2021-06-05 04:11:04,726 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 323 [2021-06-05 04:11:04,875 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 323 [2021-06-05 04:11:05,002 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 277 [2021-06-05 04:11:05,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:05,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:05,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:05,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:05,984 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:05,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:05,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:06,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023570928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:06,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:06,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:11:06,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695892091] [2021-06-05 04:11:06,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:11:06,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:06,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:11:06,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:06,014 INFO L87 Difference]: Start difference. First operand 867 states and 2726 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:06,717 INFO L93 Difference]: Finished difference Result 1037 states and 3076 transitions. [2021-06-05 04:11:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:11:06,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:06,719 INFO L225 Difference]: With dead ends: 1037 [2021-06-05 04:11:06,719 INFO L226 Difference]: Without dead ends: 1021 [2021-06-05 04:11:06,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 630.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:11:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-06-05 04:11:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 884. [2021-06-05 04:11:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.1540203850509627) internal successors, (2785), 883 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2785 transitions. [2021-06-05 04:11:06,728 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2785 transitions. Word has length 19 [2021-06-05 04:11:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:06,728 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2785 transitions. [2021-06-05 04:11:06,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2785 transitions. [2021-06-05 04:11:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:06,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:06,730 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:06,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10615 [2021-06-05 04:11:06,930 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:06,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1879280894, now seen corresponding path program 168 times [2021-06-05 04:11:06,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:06,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849035602] [2021-06-05 04:11:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:06,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:06,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849035602] [2021-06-05 04:11:06,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849035602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:06,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899348253] [2021-06-05 04:11:06,970 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:06,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:11:06,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:06,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:11:06,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:07,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899348253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:07,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:07,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:11:07,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926670537] [2021-06-05 04:11:07,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:11:07,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:07,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:11:07,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:11:07,029 INFO L87 Difference]: Start difference. First operand 884 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:07,110 INFO L93 Difference]: Finished difference Result 1214 states and 3399 transitions. [2021-06-05 04:11:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:11:07,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:07,112 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 04:11:07,112 INFO L226 Difference]: Without dead ends: 1214 [2021-06-05 04:11:07,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:11:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-06-05 04:11:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 897. [2021-06-05 04:11:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.1595982142857144) internal successors, (2831), 896 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2831 transitions. [2021-06-05 04:11:07,122 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2831 transitions. Word has length 19 [2021-06-05 04:11:07,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:07,122 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2831 transitions. [2021-06-05 04:11:07,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2831 transitions. [2021-06-05 04:11:07,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:07,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:07,123 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:07,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11027 [2021-06-05 04:11:07,323 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:07,324 INFO L82 PathProgramCache]: Analyzing trace with hash -311501637, now seen corresponding path program 169 times [2021-06-05 04:11:07,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:07,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064426223] [2021-06-05 04:11:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:07,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:07,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064426223] [2021-06-05 04:11:07,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064426223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:07,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773839973] [2021-06-05 04:11:07,449 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:07,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:07,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:07,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:08,966 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 265 [2021-06-05 04:11:09,080 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 265 [2021-06-05 04:11:09,205 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 269 [2021-06-05 04:11:09,329 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 267 [2021-06-05 04:11:09,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:09,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:09,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:09,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:11:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:09,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773839973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:09,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:09,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:11:09,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411849930] [2021-06-05 04:11:09,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:11:09,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:11:09,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:09,500 INFO L87 Difference]: Start difference. First operand 897 states and 2831 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:09,893 INFO L93 Difference]: Finished difference Result 956 states and 2950 transitions. [2021-06-05 04:11:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:11:09,893 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:09,894 INFO L225 Difference]: With dead ends: 956 [2021-06-05 04:11:09,894 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 04:11:09,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:11:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 04:11:09,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 899. [2021-06-05 04:11:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-06-05 04:11:09,903 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-06-05 04:11:09,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:09,904 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-06-05 04:11:09,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-06-05 04:11:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:09,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:09,905 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:10,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11028 [2021-06-05 04:11:10,121 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:10,121 INFO L82 PathProgramCache]: Analyzing trace with hash 432081723, now seen corresponding path program 170 times [2021-06-05 04:11:10,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:10,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286336290] [2021-06-05 04:11:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:11:10,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:10,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286336290] [2021-06-05 04:11:10,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286336290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:10,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114980216] [2021-06-05 04:11:10,217 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:10,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:10,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:10,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:10,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:10,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:10,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:10,987 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 246 [2021-06-05 04:11:11,964 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 297 [2021-06-05 04:11:12,119 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 341 [2021-06-05 04:11:12,357 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 390 [2021-06-05 04:11:12,572 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 390 [2021-06-05 04:11:12,809 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 395 [2021-06-05 04:11:13,064 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 447 [2021-06-05 04:11:13,313 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 241 [2021-06-05 04:11:13,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:14,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:14,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:14,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:14,506 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:14,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:14,506 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:14,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114980216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:14,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:14,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:11:14,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432690146] [2021-06-05 04:11:14,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:11:14,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:14,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:11:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:11:14,536 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:14,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:14,990 INFO L93 Difference]: Finished difference Result 1019 states and 3082 transitions. [2021-06-05 04:11:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:11:14,990 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:14,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:14,992 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 04:11:14,992 INFO L226 Difference]: Without dead ends: 1009 [2021-06-05 04:11:14,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 410.7ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:11:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-05 04:11:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 899. [2021-06-05 04:11:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-06-05 04:11:15,001 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-06-05 04:11:15,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:15,001 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-06-05 04:11:15,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-06-05 04:11:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:15,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:15,002 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:15,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11323 [2021-06-05 04:11:15,203 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1283225855, now seen corresponding path program 171 times [2021-06-05 04:11:15,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:15,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994728414] [2021-06-05 04:11:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:15,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:15,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994728414] [2021-06-05 04:11:15,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994728414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:15,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524452882] [2021-06-05 04:11:15,314 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:15,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:11:15,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:15,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:15,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:15,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:15,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:16,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:16,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:16,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:17,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:17,094 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:17,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:17,094 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:17,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524452882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:17,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:17,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:11:17,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115739861] [2021-06-05 04:11:17,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:11:17,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:17,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:11:17,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:17,123 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:17,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:17,698 INFO L93 Difference]: Finished difference Result 1100 states and 3241 transitions. [2021-06-05 04:11:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:11:17,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:17,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:17,699 INFO L225 Difference]: With dead ends: 1100 [2021-06-05 04:11:17,699 INFO L226 Difference]: Without dead ends: 1081 [2021-06-05 04:11:17,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:11:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-06-05 04:11:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 899. [2021-06-05 04:11:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1447661469933186) internal successors, (2824), 898 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2824 transitions. [2021-06-05 04:11:17,709 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2824 transitions. Word has length 19 [2021-06-05 04:11:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:17,709 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2824 transitions. [2021-06-05 04:11:17,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2824 transitions. [2021-06-05 04:11:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:17,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:17,710 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:17,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11806,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:17,911 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:17,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1898890171, now seen corresponding path program 172 times [2021-06-05 04:11:17,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:17,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414226591] [2021-06-05 04:11:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:18,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:18,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414226591] [2021-06-05 04:11:18,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414226591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:18,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643229266] [2021-06-05 04:11:18,038 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:18,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:18,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:18,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:18,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:18,482 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 04:11:18,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:18,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:18,911 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 255 [2021-06-05 04:11:19,219 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 281 [2021-06-05 04:11:19,431 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 287 [2021-06-05 04:11:19,819 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 199 [2021-06-05 04:11:19,944 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 199 [2021-06-05 04:11:20,064 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 204 [2021-06-05 04:11:20,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:20,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:20,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:21,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:21,376 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:21,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:21,377 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:21,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643229266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:21,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:21,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:11:21,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867994767] [2021-06-05 04:11:21,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:11:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:21,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:11:21,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:21,406 INFO L87 Difference]: Start difference. First operand 899 states and 2824 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:22,099 INFO L93 Difference]: Finished difference Result 1077 states and 3204 transitions. [2021-06-05 04:11:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:11:22,099 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:22,100 INFO L225 Difference]: With dead ends: 1077 [2021-06-05 04:11:22,100 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 04:11:22,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 723.4ms TimeCoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:11:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 04:11:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 919. [2021-06-05 04:11:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-06-05 04:11:22,110 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-06-05 04:11:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:22,110 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-06-05 04:11:22,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-06-05 04:11:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:22,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:22,111 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:22,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12108 [2021-06-05 04:11:22,333 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:22,333 INFO L82 PathProgramCache]: Analyzing trace with hash -490352513, now seen corresponding path program 173 times [2021-06-05 04:11:22,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:22,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779926580] [2021-06-05 04:11:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:22,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:22,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779926580] [2021-06-05 04:11:22,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779926580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:22,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473389923] [2021-06-05 04:11:22,434 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:22,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:11:22,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:22,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:22,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:22,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:22,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:24,357 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 328 [2021-06-05 04:11:24,520 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 343 [2021-06-05 04:11:24,682 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 343 [2021-06-05 04:11:24,870 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 350 [2021-06-05 04:11:25,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:25,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:25,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:25,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:25,730 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:25,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:25,731 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:25,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473389923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:25,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:25,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:11:25,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287814022] [2021-06-05 04:11:25,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:11:25,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:25,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:11:25,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:25,760 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:26,434 INFO L93 Difference]: Finished difference Result 1009 states and 3050 transitions. [2021-06-05 04:11:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:11:26,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:26,435 INFO L225 Difference]: With dead ends: 1009 [2021-06-05 04:11:26,435 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 04:11:26,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 635.4ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:11:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 04:11:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 919. [2021-06-05 04:11:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-06-05 04:11:26,447 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-06-05 04:11:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:26,447 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-06-05 04:11:26,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-06-05 04:11:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:26,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:26,449 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:26,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12492,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:26,653 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:26,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:26,653 INFO L82 PathProgramCache]: Analyzing trace with hash -901042152, now seen corresponding path program 174 times [2021-06-05 04:11:26,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:26,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651512902] [2021-06-05 04:11:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:26,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:26,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651512902] [2021-06-05 04:11:26,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651512902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:26,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156429246] [2021-06-05 04:11:26,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:26,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:11:26,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:26,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:11:26,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:26,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156429246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:26,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:26,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:11:26,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35461006] [2021-06-05 04:11:26,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:11:26,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:26,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:11:26,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:11:26,753 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:26,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:26,848 INFO L93 Difference]: Finished difference Result 1576 states and 4658 transitions. [2021-06-05 04:11:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:11:26,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:26,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:26,850 INFO L225 Difference]: With dead ends: 1576 [2021-06-05 04:11:26,850 INFO L226 Difference]: Without dead ends: 1576 [2021-06-05 04:11:26,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:11:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-05 04:11:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1265. [2021-06-05 04:11:26,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2207278481012658) internal successors, (4071), 1264 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4071 transitions. [2021-06-05 04:11:26,864 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4071 transitions. Word has length 19 [2021-06-05 04:11:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:26,864 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4071 transitions. [2021-06-05 04:11:26,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4071 transitions. [2021-06-05 04:11:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:26,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:26,866 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:27,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12939 [2021-06-05 04:11:27,067 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash -95823877, now seen corresponding path program 175 times [2021-06-05 04:11:27,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:27,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200004559] [2021-06-05 04:11:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:27,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:27,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200004559] [2021-06-05 04:11:27,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200004559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:27,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646729780] [2021-06-05 04:11:27,195 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:27,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:27,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:27,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:27,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:27,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:27,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:27,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:11:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:27,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646729780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:27,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:27,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:11:27,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429639019] [2021-06-05 04:11:27,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:11:27,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:27,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:11:27,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:27,994 INFO L87 Difference]: Start difference. First operand 1265 states and 4071 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:28,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:28,462 INFO L93 Difference]: Finished difference Result 1300 states and 4138 transitions. [2021-06-05 04:11:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:11:28,463 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:28,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:28,464 INFO L225 Difference]: With dead ends: 1300 [2021-06-05 04:11:28,464 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 04:11:28,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:11:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 04:11:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1265. [2021-06-05 04:11:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2056962025316458) internal successors, (4052), 1264 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4052 transitions. [2021-06-05 04:11:28,477 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4052 transitions. Word has length 19 [2021-06-05 04:11:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:28,494 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4052 transitions. [2021-06-05 04:11:28,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:28,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4052 transitions. [2021-06-05 04:11:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:28,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:28,498 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:28,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12940 [2021-06-05 04:11:28,720 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash 647759483, now seen corresponding path program 176 times [2021-06-05 04:11:28,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:28,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454461659] [2021-06-05 04:11:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:11:28,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:28,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454461659] [2021-06-05 04:11:28,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454461659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:28,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880348291] [2021-06-05 04:11:28,831 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:28,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:28,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:28,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:28,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:29,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:29,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:30,277 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 244 [2021-06-05 04:11:30,388 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 244 [2021-06-05 04:11:30,511 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 249 [2021-06-05 04:11:31,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:31,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:31,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:31,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:31,631 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:31,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:31,632 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:31,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880348291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:31,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:31,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:11:31,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357406239] [2021-06-05 04:11:31,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:11:31,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:31,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:11:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:11:31,661 INFO L87 Difference]: Start difference. First operand 1265 states and 4052 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:32,154 INFO L93 Difference]: Finished difference Result 1377 states and 4307 transitions. [2021-06-05 04:11:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:11:32,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:32,156 INFO L225 Difference]: With dead ends: 1377 [2021-06-05 04:11:32,156 INFO L226 Difference]: Without dead ends: 1365 [2021-06-05 04:11:32,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:11:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-05 04:11:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1263. [2021-06-05 04:11:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 3.2044374009508716) internal successors, (4044), 1262 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 4044 transitions. [2021-06-05 04:11:32,169 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 4044 transitions. Word has length 19 [2021-06-05 04:11:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:32,169 INFO L482 AbstractCegarLoop]: Abstraction has 1263 states and 4044 transitions. [2021-06-05 04:11:32,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:32,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 4044 transitions. [2021-06-05 04:11:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:32,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:32,170 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:32,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13055 [2021-06-05 04:11:32,392 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:32,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1498903615, now seen corresponding path program 177 times [2021-06-05 04:11:32,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:32,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232270915] [2021-06-05 04:11:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:11:32,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:32,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232270915] [2021-06-05 04:11:32,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232270915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:32,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914110546] [2021-06-05 04:11:32,487 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:32,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:11:32,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:32,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:32,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:32,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:32,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:33,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:33,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:33,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:34,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:34,786 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:34,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:34,786 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:34,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914110546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:34,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:34,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:11:34,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382477234] [2021-06-05 04:11:34,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:11:34,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:34,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:11:34,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:11:34,814 INFO L87 Difference]: Start difference. First operand 1263 states and 4044 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:35,396 INFO L93 Difference]: Finished difference Result 1437 states and 4435 transitions. [2021-06-05 04:11:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:11:35,396 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:35,398 INFO L225 Difference]: With dead ends: 1437 [2021-06-05 04:11:35,398 INFO L226 Difference]: Without dead ends: 1427 [2021-06-05 04:11:35,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 495.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:11:35,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-06-05 04:11:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1266. [2021-06-05 04:11:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.205533596837945) internal successors, (4055), 1265 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4055 transitions. [2021-06-05 04:11:35,411 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4055 transitions. Word has length 19 [2021-06-05 04:11:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:35,412 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4055 transitions. [2021-06-05 04:11:35,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4055 transitions. [2021-06-05 04:11:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:35,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:35,413 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:35,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13472,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:35,613 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2114567931, now seen corresponding path program 178 times [2021-06-05 04:11:35,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:35,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007958496] [2021-06-05 04:11:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:35,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:35,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007958496] [2021-06-05 04:11:35,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007958496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:35,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284572808] [2021-06-05 04:11:35,724 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:35,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:35,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:35,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:35,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:36,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:36,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:36,560 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 198 [2021-06-05 04:11:37,379 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 217 [2021-06-05 04:11:37,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:37,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:37,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:38,234 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 239 [2021-06-05 04:11:38,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:38,875 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:38,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:38,876 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:38,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284572808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:38,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:38,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:11:38,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932423112] [2021-06-05 04:11:38,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:11:38,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:38,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:11:38,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:38,905 INFO L87 Difference]: Start difference. First operand 1266 states and 4055 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:39,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:39,679 INFO L93 Difference]: Finished difference Result 1415 states and 4386 transitions. [2021-06-05 04:11:39,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:11:39,679 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:39,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:39,681 INFO L225 Difference]: With dead ends: 1415 [2021-06-05 04:11:39,681 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 04:11:39,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 653.1ms TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:11:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 04:11:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1283. [2021-06-05 04:11:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.207488299531981) internal successors, (4112), 1282 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4112 transitions. [2021-06-05 04:11:39,711 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4112 transitions. Word has length 19 [2021-06-05 04:11:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:39,711 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4112 transitions. [2021-06-05 04:11:39,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4112 transitions. [2021-06-05 04:11:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:39,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:39,713 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:39,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13775,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:39,914 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1223219970, now seen corresponding path program 179 times [2021-06-05 04:11:39,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:39,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420700464] [2021-06-05 04:11:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:39,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:39,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420700464] [2021-06-05 04:11:39,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420700464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:39,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352487602] [2021-06-05 04:11:39,956 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:39,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:11:39,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:39,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:11:39,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:40,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352487602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:40,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:40,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:11:40,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495232061] [2021-06-05 04:11:40,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:11:40,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:11:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:11:40,012 INFO L87 Difference]: Start difference. First operand 1283 states and 4112 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:40,081 INFO L93 Difference]: Finished difference Result 1610 states and 4775 transitions. [2021-06-05 04:11:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:11:40,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:40,083 INFO L225 Difference]: With dead ends: 1610 [2021-06-05 04:11:40,083 INFO L226 Difference]: Without dead ends: 1610 [2021-06-05 04:11:40,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:11:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-05 04:11:40,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1245. [2021-06-05 04:11:40,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-06-05 04:11:40,096 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-06-05 04:11:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:40,096 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-06-05 04:11:40,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-06-05 04:11:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:40,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:40,097 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:40,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14175,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:40,305 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash -274674753, now seen corresponding path program 180 times [2021-06-05 04:11:40,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:40,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232746575] [2021-06-05 04:11:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:40,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:40,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232746575] [2021-06-05 04:11:40,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232746575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:40,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689823339] [2021-06-05 04:11:40,405 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:40,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:11:40,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:40,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:40,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:40,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:40,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:41,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:41,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:41,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:41,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:41,871 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:41,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:41,871 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:41,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689823339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:41,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:41,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:11:41,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821179769] [2021-06-05 04:11:41,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:11:41,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:41,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:11:41,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:41,900 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:42,482 INFO L93 Difference]: Finished difference Result 1317 states and 4106 transitions. [2021-06-05 04:11:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:11:42,482 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:42,484 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 04:11:42,484 INFO L226 Difference]: Without dead ends: 1307 [2021-06-05 04:11:42,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 626.3ms TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:11:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-06-05 04:11:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1245. [2021-06-05 04:11:42,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-06-05 04:11:42,500 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-06-05 04:11:42,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:42,500 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-06-05 04:11:42,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-06-05 04:11:42,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:42,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:42,502 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:42,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14176,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:42,721 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:42,721 INFO L82 PathProgramCache]: Analyzing trace with hash -685364392, now seen corresponding path program 181 times [2021-06-05 04:11:42,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:42,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374601683] [2021-06-05 04:11:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:42,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:42,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374601683] [2021-06-05 04:11:42,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374601683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:42,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515218810] [2021-06-05 04:11:42,764 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:42,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:11:42,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:42,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515218810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:42,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:42,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:11:42,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202638495] [2021-06-05 04:11:42,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:11:42,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:11:42,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:11:42,821 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:42,920 INFO L93 Difference]: Finished difference Result 2061 states and 6320 transitions. [2021-06-05 04:11:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:11:42,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:42,923 INFO L225 Difference]: With dead ends: 2061 [2021-06-05 04:11:42,923 INFO L226 Difference]: Without dead ends: 2061 [2021-06-05 04:11:42,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:11:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-06-05 04:11:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1804. [2021-06-05 04:11:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-06-05 04:11:42,944 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-06-05 04:11:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:42,944 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-06-05 04:11:42,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-06-05 04:11:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:42,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:42,945 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:43,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14384 [2021-06-05 04:11:43,146 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:43,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1326753925, now seen corresponding path program 182 times [2021-06-05 04:11:43,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:43,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046142903] [2021-06-05 04:11:43,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:43,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:43,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046142903] [2021-06-05 04:11:43,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046142903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:43,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722619271] [2021-06-05 04:11:43,248 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:43,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:43,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:43,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:43,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:44,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:44,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:44,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:45,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:45,310 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:45,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:45,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:45,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722619271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:45,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:45,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:11:45,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756330156] [2021-06-05 04:11:45,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:11:45,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:45,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:11:45,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:45,341 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:45,990 INFO L93 Difference]: Finished difference Result 1866 states and 5973 transitions. [2021-06-05 04:11:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:11:45,990 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:45,992 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 04:11:45,992 INFO L226 Difference]: Without dead ends: 1856 [2021-06-05 04:11:45,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 708.3ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:11:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-06-05 04:11:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1804. [2021-06-05 04:11:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-06-05 04:11:46,012 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-06-05 04:11:46,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:46,012 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-06-05 04:11:46,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:46,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-06-05 04:11:46,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:46,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:46,013 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:46,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14385,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:46,214 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:46,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:46,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1191710658, now seen corresponding path program 183 times [2021-06-05 04:11:46,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:46,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603220155] [2021-06-05 04:11:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:46,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:46,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603220155] [2021-06-05 04:11:46,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603220155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:46,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823668589] [2021-06-05 04:11:46,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:46,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:11:46,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:46,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:11:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:46,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823668589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:46,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:46,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:11:46,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836544993] [2021-06-05 04:11:46,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:11:46,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:46,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:11:46,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:11:46,316 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:46,451 INFO L93 Difference]: Finished difference Result 2380 states and 7376 transitions. [2021-06-05 04:11:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:11:46,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:46,455 INFO L225 Difference]: With dead ends: 2380 [2021-06-05 04:11:46,455 INFO L226 Difference]: Without dead ends: 2380 [2021-06-05 04:11:46,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:11:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-05 04:11:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2051. [2021-06-05 04:11:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.2712195121951217) internal successors, (6706), 2050 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6706 transitions. [2021-06-05 04:11:46,480 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6706 transitions. Word has length 19 [2021-06-05 04:11:46,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:46,480 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6706 transitions. [2021-06-05 04:11:46,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:46,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6706 transitions. [2021-06-05 04:11:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:46,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:46,482 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:46,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14698 [2021-06-05 04:11:46,683 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:46,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:46,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1038408603, now seen corresponding path program 184 times [2021-06-05 04:11:46,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:46,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370499934] [2021-06-05 04:11:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:11:46,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:46,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370499934] [2021-06-05 04:11:46,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370499934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:46,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108107401] [2021-06-05 04:11:46,764 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:46,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:46,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:46,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:46,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:47,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:47,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:48,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:48,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:48,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:48,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:11:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:48,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108107401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:48,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:48,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 04:11:48,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584501900] [2021-06-05 04:11:48,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:11:48,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:48,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:11:48,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:11:48,360 INFO L87 Difference]: Start difference. First operand 2051 states and 6706 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:48,620 INFO L93 Difference]: Finished difference Result 2076 states and 6747 transitions. [2021-06-05 04:11:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:11:48,621 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:48,623 INFO L225 Difference]: With dead ends: 2076 [2021-06-05 04:11:48,623 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 04:11:48,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 04:11:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2051. [2021-06-05 04:11:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.270243902439024) internal successors, (6704), 2050 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6704 transitions. [2021-06-05 04:11:48,647 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6704 transitions. Word has length 19 [2021-06-05 04:11:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:48,647 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6704 transitions. [2021-06-05 04:11:48,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6704 transitions. [2021-06-05 04:11:48,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:48,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:48,650 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:48,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14699 [2021-06-05 04:11:48,865 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash -186075179, now seen corresponding path program 185 times [2021-06-05 04:11:48,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:48,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101134412] [2021-06-05 04:11:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:11:49,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:49,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101134412] [2021-06-05 04:11:49,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101134412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:49,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579484771] [2021-06-05 04:11:49,022 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:49,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:11:49,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:49,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:49,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:49,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:49,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:50,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:50,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:50,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:50,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:11:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:50,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579484771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:50,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:50,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 04:11:50,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731496753] [2021-06-05 04:11:50,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:11:50,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:50,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:11:50,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:11:50,383 INFO L87 Difference]: Start difference. First operand 2051 states and 6704 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:50,645 INFO L93 Difference]: Finished difference Result 2076 states and 6752 transitions. [2021-06-05 04:11:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:11:50,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:50,647 INFO L225 Difference]: With dead ends: 2076 [2021-06-05 04:11:50,647 INFO L226 Difference]: Without dead ends: 2067 [2021-06-05 04:11:50,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:11:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-06-05 04:11:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2053. [2021-06-05 04:11:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 3.269980506822612) internal successors, (6710), 2052 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 6710 transitions. [2021-06-05 04:11:50,669 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 6710 transitions. Word has length 19 [2021-06-05 04:11:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:50,669 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 6710 transitions. [2021-06-05 04:11:50,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 6710 transitions. [2021-06-05 04:11:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:50,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:50,671 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:50,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14956,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:50,872 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:50,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:50,872 INFO L82 PathProgramCache]: Analyzing trace with hash 557508181, now seen corresponding path program 186 times [2021-06-05 04:11:50,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:50,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785675710] [2021-06-05 04:11:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:11:50,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:50,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785675710] [2021-06-05 04:11:50,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785675710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:50,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782785480] [2021-06-05 04:11:50,954 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:50,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:11:50,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:50,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:50,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:51,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:51,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:11:51,955 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 305 [2021-06-05 04:11:52,130 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 425 [2021-06-05 04:11:53,260 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 357 [2021-06-05 04:11:54,143 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 451 [2021-06-05 04:11:54,548 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 577 [2021-06-05 04:11:54,928 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 577 [2021-06-05 04:11:55,362 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 582 [2021-06-05 04:11:55,832 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 698 [2021-06-05 04:11:56,168 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 511 [2021-06-05 04:11:56,776 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 315 [2021-06-05 04:11:57,183 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 259 [2021-06-05 04:11:57,395 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 262 [2021-06-05 04:11:57,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:57,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:57,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:11:58,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:58,870 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:11:58,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:58,871 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:11:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:58,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782785480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:58,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:58,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 04:11:58,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115564037] [2021-06-05 04:11:58,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:11:58,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:58,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:11:58,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:11:58,900 INFO L87 Difference]: Start difference. First operand 2053 states and 6710 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:59,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:59,249 INFO L93 Difference]: Finished difference Result 2108 states and 6809 transitions. [2021-06-05 04:11:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:11:59,249 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:11:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:59,251 INFO L225 Difference]: With dead ends: 2108 [2021-06-05 04:11:59,252 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 04:11:59,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:11:59,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 04:11:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 2052. [2021-06-05 04:11:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.270112140419308) internal successors, (6707), 2051 states have internal predecessors, (6707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6707 transitions. [2021-06-05 04:11:59,274 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6707 transitions. Word has length 19 [2021-06-05 04:11:59,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:59,274 INFO L482 AbstractCegarLoop]: Abstraction has 2052 states and 6707 transitions. [2021-06-05 04:11:59,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6707 transitions. [2021-06-05 04:11:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:11:59,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:59,276 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:59,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15124,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:59,476 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:59,476 INFO L82 PathProgramCache]: Analyzing trace with hash -5033861, now seen corresponding path program 187 times [2021-06-05 04:11:59,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:59,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804220982] [2021-06-05 04:11:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:11:59,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:59,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804220982] [2021-06-05 04:11:59,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804220982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:59,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346421157] [2021-06-05 04:11:59,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:59,615 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:11:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:59,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:59,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:01,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:01,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:01,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:02,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:02,189 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:02,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:02,189 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:02,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346421157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:02,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:02,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:12:02,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151972925] [2021-06-05 04:12:02,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:12:02,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:02,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:12:02,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:02,217 INFO L87 Difference]: Start difference. First operand 2052 states and 6707 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:02,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:02,800 INFO L93 Difference]: Finished difference Result 2150 states and 6903 transitions. [2021-06-05 04:12:02,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:12:02,800 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:02,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:02,802 INFO L225 Difference]: With dead ends: 2150 [2021-06-05 04:12:02,802 INFO L226 Difference]: Without dead ends: 2140 [2021-06-05 04:12:02,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:12:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-06-05 04:12:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2066. [2021-06-05 04:12:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 3.2677966101694915) internal successors, (6748), 2065 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 6748 transitions. [2021-06-05 04:12:02,824 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 6748 transitions. Word has length 19 [2021-06-05 04:12:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:02,824 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 6748 transitions. [2021-06-05 04:12:02,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 6748 transitions. [2021-06-05 04:12:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:02,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:02,826 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:03,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16111 [2021-06-05 04:12:03,027 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:03,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1900690751, now seen corresponding path program 188 times [2021-06-05 04:12:03,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:03,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138300898] [2021-06-05 04:12:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:03,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:03,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138300898] [2021-06-05 04:12:03,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138300898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:03,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40603276] [2021-06-05 04:12:03,133 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:12:03,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:03,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:03,163 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:03,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:03,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:03,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:04,243 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 267 [2021-06-05 04:12:04,366 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 281 [2021-06-05 04:12:04,979 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 281 [2021-06-05 04:12:05,110 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 281 [2021-06-05 04:12:05,258 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 286 [2021-06-05 04:12:05,481 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 299 [2021-06-05 04:12:05,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:06,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:06,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:06,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:06,382 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:06,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:06,382 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:06,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40603276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:06,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:06,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:12:06,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289846140] [2021-06-05 04:12:06,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:12:06,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:06,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:12:06,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:06,410 INFO L87 Difference]: Start difference. First operand 2066 states and 6748 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:07,003 INFO L93 Difference]: Finished difference Result 2201 states and 7027 transitions. [2021-06-05 04:12:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:12:07,004 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:07,006 INFO L225 Difference]: With dead ends: 2201 [2021-06-05 04:12:07,006 INFO L226 Difference]: Without dead ends: 2171 [2021-06-05 04:12:07,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 655.5ms TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:12:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-06-05 04:12:07,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2055. [2021-06-05 04:12:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2658227848101267) internal successors, (6708), 2054 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:07,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6708 transitions. [2021-06-05 04:12:07,028 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6708 transitions. Word has length 19 [2021-06-05 04:12:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:07,029 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6708 transitions. [2021-06-05 04:12:07,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:07,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6708 transitions. [2021-06-05 04:12:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:07,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:07,030 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:07,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16439 [2021-06-05 04:12:07,231 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:07,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:07,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1478101077, now seen corresponding path program 189 times [2021-06-05 04:12:07,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:07,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273709395] [2021-06-05 04:12:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:07,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:07,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273709395] [2021-06-05 04:12:07,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273709395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:07,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082361520] [2021-06-05 04:12:07,358 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:07,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:12:07,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:07,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:07,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:07,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:09,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:09,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:09,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:10,107 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 231 [2021-06-05 04:12:10,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:10,253 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:10,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:10,253 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:10,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082361520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:10,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:10,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:12:10,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503297815] [2021-06-05 04:12:10,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:12:10,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:10,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:12:10,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:12:10,282 INFO L87 Difference]: Start difference. First operand 2055 states and 6708 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:10,876 INFO L93 Difference]: Finished difference Result 2182 states and 6988 transitions. [2021-06-05 04:12:10,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:12:10,876 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:10,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:10,878 INFO L225 Difference]: With dead ends: 2182 [2021-06-05 04:12:10,878 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 04:12:10,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:12:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 04:12:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2074. [2021-06-05 04:12:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 3.263868789194404) internal successors, (6766), 2073 states have internal predecessors, (6766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 6766 transitions. [2021-06-05 04:12:10,900 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 6766 transitions. Word has length 19 [2021-06-05 04:12:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:10,900 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 6766 transitions. [2021-06-05 04:12:10,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 6766 transitions. [2021-06-05 04:12:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:10,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:10,902 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:11,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16811,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:11,103 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:11,103 INFO L82 PathProgramCache]: Analyzing trace with hash -911141607, now seen corresponding path program 190 times [2021-06-05 04:12:11,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:11,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133118641] [2021-06-05 04:12:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:11,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:11,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133118641] [2021-06-05 04:12:11,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133118641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:11,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145627243] [2021-06-05 04:12:11,202 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:11,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:11,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:11,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:11,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:11,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:11,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:12,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:12,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:12,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:13,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:13,553 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:13,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:13,554 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:13,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145627243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:13,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:13,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:12:13,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852190738] [2021-06-05 04:12:13,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:12:13,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:13,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:12:13,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:12:13,582 INFO L87 Difference]: Start difference. First operand 2074 states and 6766 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:14,268 INFO L93 Difference]: Finished difference Result 2241 states and 7161 transitions. [2021-06-05 04:12:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:12:14,269 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:14,271 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 04:12:14,271 INFO L226 Difference]: Without dead ends: 2215 [2021-06-05 04:12:14,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:12:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-06-05 04:12:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2055. [2021-06-05 04:12:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2633885102239533) internal successors, (6703), 2054 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6703 transitions. [2021-06-05 04:12:14,296 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6703 transitions. Word has length 19 [2021-06-05 04:12:14,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:14,296 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6703 transitions. [2021-06-05 04:12:14,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:14,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6703 transitions. [2021-06-05 04:12:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:14,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:14,298 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:14,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17226,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:14,498 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:14,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1963220779, now seen corresponding path program 191 times [2021-06-05 04:12:14,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:14,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260809252] [2021-06-05 04:12:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:14,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260809252] [2021-06-05 04:12:14,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260809252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419275276] [2021-06-05 04:12:14,600 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:14,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:12:14,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:14,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:14,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:14,998 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 04:12:14,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:14,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:16,449 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 279 [2021-06-05 04:12:16,567 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 279 [2021-06-05 04:12:16,744 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 267 [2021-06-05 04:12:17,115 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 174 [2021-06-05 04:12:17,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:17,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:17,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:17,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:17,636 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:17,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:17,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:17,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419275276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:17,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:17,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:12:17,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491988279] [2021-06-05 04:12:17,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:12:17,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:17,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:12:17,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:12:17,666 INFO L87 Difference]: Start difference. First operand 2055 states and 6703 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:18,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:18,277 INFO L93 Difference]: Finished difference Result 2116 states and 6803 transitions. [2021-06-05 04:12:18,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:12:18,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:18,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:18,279 INFO L225 Difference]: With dead ends: 2116 [2021-06-05 04:12:18,279 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 04:12:18,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 701.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:12:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 04:12:18,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2055. [2021-06-05 04:12:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2633885102239533) internal successors, (6703), 2054 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6703 transitions. [2021-06-05 04:12:18,302 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6703 transitions. Word has length 19 [2021-06-05 04:12:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:18,302 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6703 transitions. [2021-06-05 04:12:18,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6703 transitions. [2021-06-05 04:12:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:18,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:18,303 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:18,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17573 [2021-06-05 04:12:18,504 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:18,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1999747909, now seen corresponding path program 192 times [2021-06-05 04:12:18,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:18,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009126553] [2021-06-05 04:12:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:18,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:18,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009126553] [2021-06-05 04:12:18,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009126553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:18,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245170258] [2021-06-05 04:12:18,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:18,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:12:18,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:18,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:18,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:19,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:19,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:19,566 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 297 [2021-06-05 04:12:20,494 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 281 [2021-06-05 04:12:20,640 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 281 [2021-06-05 04:12:20,774 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 285 [2021-06-05 04:12:20,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:20,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:20,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:20,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:20,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245170258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:20,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:20,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:12:20,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514819084] [2021-06-05 04:12:20,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:12:20,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:20,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:12:20,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:12:20,960 INFO L87 Difference]: Start difference. First operand 2055 states and 6703 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:21,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:21,363 INFO L93 Difference]: Finished difference Result 2086 states and 6761 transitions. [2021-06-05 04:12:21,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:12:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:21,365 INFO L225 Difference]: With dead ends: 2086 [2021-06-05 04:12:21,365 INFO L226 Difference]: Without dead ends: 2075 [2021-06-05 04:12:21,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 473.0ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:12:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-06-05 04:12:21,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2055. [2021-06-05 04:12:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2599805258033108) internal successors, (6696), 2054 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6696 transitions. [2021-06-05 04:12:21,387 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6696 transitions. Word has length 19 [2021-06-05 04:12:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:21,388 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6696 transitions. [2021-06-05 04:12:21,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6696 transitions. [2021-06-05 04:12:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:21,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:21,389 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:21,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17916,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:21,590 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:21,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:21,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1256164549, now seen corresponding path program 193 times [2021-06-05 04:12:21,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:21,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034520674] [2021-06-05 04:12:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:21,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:21,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034520674] [2021-06-05 04:12:21,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034520674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:21,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23891675] [2021-06-05 04:12:21,693 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:21,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:22,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:22,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:22,605 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 220 [2021-06-05 04:12:22,793 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 232 [2021-06-05 04:12:24,139 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 283 [2021-06-05 04:12:24,371 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 290 [2021-06-05 04:12:24,685 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 397 [2021-06-05 04:12:24,969 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 397 [2021-06-05 04:12:25,287 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 404 [2021-06-05 04:12:25,601 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 402 [2021-06-05 04:12:26,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:26,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:26,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:27,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:27,688 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:27,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:27,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:27,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23891675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:27,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:27,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:12:27,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833943955] [2021-06-05 04:12:27,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:12:27,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:27,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:12:27,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:27,719 INFO L87 Difference]: Start difference. First operand 2055 states and 6696 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:28,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:28,491 INFO L93 Difference]: Finished difference Result 2182 states and 7001 transitions. [2021-06-05 04:12:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:12:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:28,494 INFO L225 Difference]: With dead ends: 2182 [2021-06-05 04:12:28,494 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 04:12:28,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 488.1ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:12:28,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 04:12:28,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2055. [2021-06-05 04:12:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2599805258033108) internal successors, (6696), 2054 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6696 transitions. [2021-06-05 04:12:28,516 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6696 transitions. Word has length 19 [2021-06-05 04:12:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:28,516 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6696 transitions. [2021-06-05 04:12:28,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6696 transitions. [2021-06-05 04:12:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:28,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:28,518 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:28,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18314 [2021-06-05 04:12:28,718 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:28,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:28,719 INFO L82 PathProgramCache]: Analyzing trace with hash -405020417, now seen corresponding path program 194 times [2021-06-05 04:12:28,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:28,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531368510] [2021-06-05 04:12:28,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:28,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:28,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531368510] [2021-06-05 04:12:28,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531368510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:28,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772143990] [2021-06-05 04:12:28,812 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:28,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:28,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:28,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:28,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:29,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:29,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:30,532 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 225 [2021-06-05 04:12:30,650 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 237 [2021-06-05 04:12:30,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:30,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:30,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:31,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:31,286 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:31,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:31,287 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:31,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772143990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:31,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:31,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:12:31,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442701036] [2021-06-05 04:12:31,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:12:31,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:31,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:12:31,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:31,315 INFO L87 Difference]: Start difference. First operand 2055 states and 6696 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:32,171 INFO L93 Difference]: Finished difference Result 2292 states and 7285 transitions. [2021-06-05 04:12:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:12:32,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:32,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:32,174 INFO L225 Difference]: With dead ends: 2292 [2021-06-05 04:12:32,174 INFO L226 Difference]: Without dead ends: 2280 [2021-06-05 04:12:32,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 591.8ms TimeCoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:12:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-05 04:12:32,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2076. [2021-06-05 04:12:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 3.261686746987952) internal successors, (6768), 2075 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6768 transitions. [2021-06-05 04:12:32,197 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6768 transitions. Word has length 19 [2021-06-05 04:12:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:32,197 INFO L482 AbstractCegarLoop]: Abstraction has 2076 states and 6768 transitions. [2021-06-05 04:12:32,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6768 transitions. [2021-06-05 04:12:32,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:32,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:32,199 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:32,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18885,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:32,399 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash 210643899, now seen corresponding path program 195 times [2021-06-05 04:12:32,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:32,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49900408] [2021-06-05 04:12:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:32,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:32,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49900408] [2021-06-05 04:12:32,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49900408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:32,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414580550] [2021-06-05 04:12:32,549 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:32,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:12:32,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:32,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:32,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:32,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:32,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:34,180 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 265 [2021-06-05 04:12:36,190 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 389 [2021-06-05 04:12:36,373 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 389 [2021-06-05 04:12:36,574 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 848 DAG size of output: 392 [2021-06-05 04:12:36,866 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 517 [2021-06-05 04:12:37,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:37,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:37,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:37,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:37,714 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:37,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:37,715 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:37,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414580550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:37,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:37,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:12:37,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984044841] [2021-06-05 04:12:37,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:12:37,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:37,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:12:37,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:12:37,745 INFO L87 Difference]: Start difference. First operand 2076 states and 6768 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:12:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:38,830 INFO L93 Difference]: Finished difference Result 2278 states and 7226 transitions. [2021-06-05 04:12:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:12:38,830 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:12:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:38,833 INFO L225 Difference]: With dead ends: 2278 [2021-06-05 04:12:38,833 INFO L226 Difference]: Without dead ends: 2266 [2021-06-05 04:12:38,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 868.8ms TimeCoverageRelationStatistics Valid=321, Invalid=2229, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 04:12:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-06-05 04:12:38,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2093. [2021-06-05 04:12:38,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2092 states have (on average 3.2633843212237093) internal successors, (6827), 2092 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 6827 transitions. [2021-06-05 04:12:38,857 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 6827 transitions. Word has length 19 [2021-06-05 04:12:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:38,857 INFO L482 AbstractCegarLoop]: Abstraction has 2093 states and 6827 transitions. [2021-06-05 04:12:38,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:12:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 6827 transitions. [2021-06-05 04:12:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:38,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:38,859 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:39,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19223 [2021-06-05 04:12:39,059 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:39,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2116368511, now seen corresponding path program 196 times [2021-06-05 04:12:39,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:39,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6589786] [2021-06-05 04:12:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:39,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6589786] [2021-06-05 04:12:39,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6589786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350702458] [2021-06-05 04:12:39,177 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:39,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:39,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:39,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:39,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:39,579 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 04:12:39,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:39,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:40,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:40,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:40,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:40,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:40,998 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:40,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:40,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:41,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350702458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:41,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:41,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:12:41,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838127170] [2021-06-05 04:12:41,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:12:41,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:12:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:12:41,028 INFO L87 Difference]: Start difference. First operand 2093 states and 6827 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:12:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:42,061 INFO L93 Difference]: Finished difference Result 2437 states and 7752 transitions. [2021-06-05 04:12:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:12:42,061 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:12:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:42,064 INFO L225 Difference]: With dead ends: 2437 [2021-06-05 04:12:42,064 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 04:12:42,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 851.4ms TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 04:12:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 04:12:42,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2022. [2021-06-05 04:12:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 3.2300841167738743) internal successors, (6528), 2021 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 6528 transitions. [2021-06-05 04:12:42,087 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 6528 transitions. Word has length 19 [2021-06-05 04:12:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:42,087 INFO L482 AbstractCegarLoop]: Abstraction has 2022 states and 6528 transitions. [2021-06-05 04:12:42,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:12:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 6528 transitions. [2021-06-05 04:12:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:42,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:42,089 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:42,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19814,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:42,290 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1705678872, now seen corresponding path program 197 times [2021-06-05 04:12:42,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:42,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125086144] [2021-06-05 04:12:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:42,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:42,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125086144] [2021-06-05 04:12:42,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125086144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:42,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713812836] [2021-06-05 04:12:42,334 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:42,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:12:42,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:12:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:42,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713812836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:42,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:42,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:12:42,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995515170] [2021-06-05 04:12:42,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:12:42,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:42,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:12:42,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:12:42,395 INFO L87 Difference]: Start difference. First operand 2022 states and 6528 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:42,487 INFO L93 Difference]: Finished difference Result 2332 states and 7081 transitions. [2021-06-05 04:12:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:12:42,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:42,490 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 04:12:42,490 INFO L226 Difference]: Without dead ends: 2332 [2021-06-05 04:12:42,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:12:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-05 04:12:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1261. [2021-06-05 04:12:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.1634920634920634) internal successors, (3986), 1260 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3986 transitions. [2021-06-05 04:12:42,510 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3986 transitions. Word has length 19 [2021-06-05 04:12:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:42,510 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 3986 transitions. [2021-06-05 04:12:42,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3986 transitions. [2021-06-05 04:12:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:42,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:42,512 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:42,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20067 [2021-06-05 04:12:42,712 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:42,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1064289339, now seen corresponding path program 198 times [2021-06-05 04:12:42,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:42,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192614980] [2021-06-05 04:12:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:42,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:42,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192614980] [2021-06-05 04:12:42,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192614980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:42,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363473267] [2021-06-05 04:12:42,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:42,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:12:42,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:42,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:43,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:43,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:44,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:44,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:44,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:44,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:44,542 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:44,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:44,543 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:44,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363473267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:44,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:44,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:12:44,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494472149] [2021-06-05 04:12:44,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:12:44,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:44,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:12:44,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:12:44,573 INFO L87 Difference]: Start difference. First operand 1261 states and 3986 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:12:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:45,321 INFO L93 Difference]: Finished difference Result 1351 states and 4144 transitions. [2021-06-05 04:12:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:12:45,322 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:12:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:45,323 INFO L225 Difference]: With dead ends: 1351 [2021-06-05 04:12:45,323 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 04:12:45,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 789.4ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:12:45,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 04:12:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1261. [2021-06-05 04:12:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.1634920634920634) internal successors, (3986), 1260 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3986 transitions. [2021-06-05 04:12:45,336 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3986 transitions. Word has length 19 [2021-06-05 04:12:45,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:45,336 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 3986 transitions. [2021-06-05 04:12:45,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:12:45,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3986 transitions. [2021-06-05 04:12:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:45,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:45,337 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:45,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20068 [2021-06-05 04:12:45,538 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1199332606, now seen corresponding path program 199 times [2021-06-05 04:12:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:45,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038045166] [2021-06-05 04:12:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:45,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:45,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038045166] [2021-06-05 04:12:45,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038045166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:45,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719003114] [2021-06-05 04:12:45,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:12:45,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:45,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719003114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:45,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:45,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:12:45,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962398372] [2021-06-05 04:12:45,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:12:45,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:45,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:12:45,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:12:45,642 INFO L87 Difference]: Start difference. First operand 1261 states and 3986 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:45,765 INFO L93 Difference]: Finished difference Result 1892 states and 5707 transitions. [2021-06-05 04:12:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:12:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:45,768 INFO L225 Difference]: With dead ends: 1892 [2021-06-05 04:12:45,768 INFO L226 Difference]: Without dead ends: 1892 [2021-06-05 04:12:45,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:12:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-06-05 04:12:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1496. [2021-06-05 04:12:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.181939799331104) internal successors, (4757), 1495 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 4757 transitions. [2021-06-05 04:12:45,785 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 4757 transitions. Word has length 19 [2021-06-05 04:12:45,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:45,785 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 4757 transitions. [2021-06-05 04:12:45,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 4757 transitions. [2021-06-05 04:12:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:45,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:45,787 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:45,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20335 [2021-06-05 04:12:45,987 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:45,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:45,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1485393921, now seen corresponding path program 200 times [2021-06-05 04:12:45,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:45,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852530679] [2021-06-05 04:12:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:46,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:46,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852530679] [2021-06-05 04:12:46,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852530679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:46,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744419673] [2021-06-05 04:12:46,106 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:46,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:46,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:46,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:46,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:46,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:46,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:47,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:47,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:47,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:47,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:47,932 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:47,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:47,933 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:47,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744419673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:47,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:47,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:12:47,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162658066] [2021-06-05 04:12:47,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:12:47,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:47,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:12:47,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:12:47,963 INFO L87 Difference]: Start difference. First operand 1496 states and 4757 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:12:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:48,738 INFO L93 Difference]: Finished difference Result 1563 states and 4870 transitions. [2021-06-05 04:12:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:12:48,738 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:12:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:48,740 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 04:12:48,740 INFO L226 Difference]: Without dead ends: 1553 [2021-06-05 04:12:48,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 874.1ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:12:48,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-06-05 04:12:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1496. [2021-06-05 04:12:48,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.181939799331104) internal successors, (4757), 1495 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 4757 transitions. [2021-06-05 04:12:48,755 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 4757 transitions. Word has length 19 [2021-06-05 04:12:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:48,755 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 4757 transitions. [2021-06-05 04:12:48,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:12:48,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 4757 transitions. [2021-06-05 04:12:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:48,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:48,756 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:48,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20336 [2021-06-05 04:12:48,957 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:48,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:48,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1612499752, now seen corresponding path program 201 times [2021-06-05 04:12:48,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:48,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88754711] [2021-06-05 04:12:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:49,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:49,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88754711] [2021-06-05 04:12:49,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88754711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:49,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641394697] [2021-06-05 04:12:49,003 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:49,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:12:49,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:12:49,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:49,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641394697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:49,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:49,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:12:49,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332904364] [2021-06-05 04:12:49,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:12:49,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:49,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:12:49,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:12:49,065 INFO L87 Difference]: Start difference. First operand 1496 states and 4757 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:49,239 INFO L93 Difference]: Finished difference Result 1980 states and 5974 transitions. [2021-06-05 04:12:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:12:49,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:49,241 INFO L225 Difference]: With dead ends: 1980 [2021-06-05 04:12:49,241 INFO L226 Difference]: Without dead ends: 1980 [2021-06-05 04:12:49,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:12:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-06-05 04:12:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1650. [2021-06-05 04:12:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.187386294724075) internal successors, (5256), 1649 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5256 transitions. [2021-06-05 04:12:49,259 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5256 transitions. Word has length 19 [2021-06-05 04:12:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:49,259 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5256 transitions. [2021-06-05 04:12:49,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5256 transitions. [2021-06-05 04:12:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:49,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:49,260 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:49,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20582 [2021-06-05 04:12:49,461 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash 705955403, now seen corresponding path program 202 times [2021-06-05 04:12:49,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:49,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149509724] [2021-06-05 04:12:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:49,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:49,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149509724] [2021-06-05 04:12:49,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149509724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:49,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136083941] [2021-06-05 04:12:49,553 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:49,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:49,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:49,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:49,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:49,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:49,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:50,355 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 213 [2021-06-05 04:12:51,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:51,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:51,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:51,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:51,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136083941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:51,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:51,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:12:51,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909635913] [2021-06-05 04:12:51,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:12:51,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:12:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:51,475 INFO L87 Difference]: Start difference. First operand 1650 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:51,718 INFO L93 Difference]: Finished difference Result 1674 states and 5294 transitions. [2021-06-05 04:12:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:12:51,719 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:51,720 INFO L225 Difference]: With dead ends: 1674 [2021-06-05 04:12:51,720 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 04:12:51,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:12:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 04:12:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1650. [2021-06-05 04:12:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.1861734384475437) internal successors, (5254), 1649 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5254 transitions. [2021-06-05 04:12:51,756 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5254 transitions. Word has length 19 [2021-06-05 04:12:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:51,756 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5254 transitions. [2021-06-05 04:12:51,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5254 transitions. [2021-06-05 04:12:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:51,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:51,757 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:51,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20583,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:51,958 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:51,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1558288827, now seen corresponding path program 203 times [2021-06-05 04:12:51,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:51,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152055766] [2021-06-05 04:12:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:52,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:52,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152055766] [2021-06-05 04:12:52,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152055766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:52,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336521918] [2021-06-05 04:12:52,055 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:52,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:12:52,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:52,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:52,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:52,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:52,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:52,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:52,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:52,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:52,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336521918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:52,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:52,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:12:52,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078861529] [2021-06-05 04:12:52,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:12:52,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:52,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:12:52,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:52,746 INFO L87 Difference]: Start difference. First operand 1650 states and 5254 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:53,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:53,051 INFO L93 Difference]: Finished difference Result 1675 states and 5302 transitions. [2021-06-05 04:12:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:12:53,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:53,053 INFO L225 Difference]: With dead ends: 1675 [2021-06-05 04:12:53,053 INFO L226 Difference]: Without dead ends: 1666 [2021-06-05 04:12:53,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 389.1ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:12:53,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2021-06-05 04:12:53,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1652. [2021-06-05 04:12:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 3.1859479103573594) internal successors, (5260), 1651 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 5260 transitions. [2021-06-05 04:12:53,070 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 5260 transitions. Word has length 19 [2021-06-05 04:12:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:53,070 INFO L482 AbstractCegarLoop]: Abstraction has 1652 states and 5260 transitions. [2021-06-05 04:12:53,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 5260 transitions. [2021-06-05 04:12:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:53,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:53,071 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:53,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20834,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:53,272 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:53,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1993095109, now seen corresponding path program 204 times [2021-06-05 04:12:53,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:53,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831614713] [2021-06-05 04:12:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:53,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:53,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831614713] [2021-06-05 04:12:53,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831614713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:53,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499308404] [2021-06-05 04:12:53,366 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:53,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:12:53,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:53,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:53,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:53,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:53,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:55,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:55,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:55,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:56,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:56,373 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:56,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:56,374 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:12:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:56,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499308404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:56,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:56,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:12:56,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568731280] [2021-06-05 04:12:56,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:12:56,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:56,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:12:56,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:56,404 INFO L87 Difference]: Start difference. First operand 1652 states and 5260 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:56,843 INFO L93 Difference]: Finished difference Result 1724 states and 5414 transitions. [2021-06-05 04:12:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:12:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:12:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:56,845 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 04:12:56,845 INFO L226 Difference]: Without dead ends: 1714 [2021-06-05 04:12:56,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 354.0ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:12:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-05 04:12:56,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1651. [2021-06-05 04:12:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 04:12:56,862 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 04:12:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:56,862 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 04:12:56,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 04:12:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:12:56,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:56,864 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:57,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20930,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:57,065 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash -218856773, now seen corresponding path program 205 times [2021-06-05 04:12:57,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:57,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732662880] [2021-06-05 04:12:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:57,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:57,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732662880] [2021-06-05 04:12:57,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732662880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:57,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757881637] [2021-06-05 04:12:57,171 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:57,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:12:57,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:57,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:57,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:12:59,069 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 321 [2021-06-05 04:13:00,171 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 319 [2021-06-05 04:13:00,303 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 319 [2021-06-05 04:13:00,450 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 321 [2021-06-05 04:13:00,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:13:00,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:00,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:01,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:01,734 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:13:01,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:13:01,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:13:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:01,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757881637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:01,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:01,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:13:01,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160501786] [2021-06-05 04:13:01,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:13:01,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:13:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:13:01,763 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:02,487 INFO L93 Difference]: Finished difference Result 1757 states and 5501 transitions. [2021-06-05 04:13:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:13:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:13:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:02,489 INFO L225 Difference]: With dead ends: 1757 [2021-06-05 04:13:02,490 INFO L226 Difference]: Without dead ends: 1747 [2021-06-05 04:13:02,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 778.9ms TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:13:02,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-06-05 04:13:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1651. [2021-06-05 04:13:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 04:13:02,507 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 04:13:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:02,507 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 04:13:02,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:02,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 04:13:02,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:02,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:02,508 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:02,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21384,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:02,709 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:02,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1486313951, now seen corresponding path program 206 times [2021-06-05 04:13:02,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:02,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59557433] [2021-06-05 04:13:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:02,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:02,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59557433] [2021-06-05 04:13:02,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59557433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:02,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293285982] [2021-06-05 04:13:02,820 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:02,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:02,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:02,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:02,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:03,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:03,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:13:04,468 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 328 [2021-06-05 04:13:04,636 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 328 [2021-06-05 04:13:04,827 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 335 [2021-06-05 04:13:05,073 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 392 [2021-06-05 04:13:05,798 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 149 [2021-06-05 04:13:05,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:13:05,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:05,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:06,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:06,291 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:13:06,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:13:06,292 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:13:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:06,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293285982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:06,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:06,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:13:06,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497269936] [2021-06-05 04:13:06,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:13:06,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:06,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:13:06,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:06,320 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:07,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:07,120 INFO L93 Difference]: Finished difference Result 1826 states and 5698 transitions. [2021-06-05 04:13:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:13:07,121 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:13:07,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:07,123 INFO L225 Difference]: With dead ends: 1826 [2021-06-05 04:13:07,123 INFO L226 Difference]: Without dead ends: 1816 [2021-06-05 04:13:07,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 828.2ms TimeCoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:13:07,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-06-05 04:13:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1651. [2021-06-05 04:13:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 04:13:07,141 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 04:13:07,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:07,141 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 04:13:07,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 04:13:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:07,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:07,143 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:07,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21887,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:07,344 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:07,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:07,344 INFO L82 PathProgramCache]: Analyzing trace with hash 258970085, now seen corresponding path program 207 times [2021-06-05 04:13:07,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:07,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634096117] [2021-06-05 04:13:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:07,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:07,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634096117] [2021-06-05 04:13:07,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634096117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:07,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823645003] [2021-06-05 04:13:07,461 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:07,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:13:07,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:07,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:07,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:07,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:07,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:13:08,323 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 199 [2021-06-05 04:13:08,795 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 211 [2021-06-05 04:13:09,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:13:09,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:09,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:10,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:10,267 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:13:10,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:13:10,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:13:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:10,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823645003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:10,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:10,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:13:10,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91320086] [2021-06-05 04:13:10,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:13:10,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:10,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:13:10,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:10,297 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:11,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:11,061 INFO L93 Difference]: Finished difference Result 1724 states and 5388 transitions. [2021-06-05 04:13:11,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:13:11,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:13:11,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:11,063 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 04:13:11,063 INFO L226 Difference]: Without dead ends: 1714 [2021-06-05 04:13:11,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 886.6ms TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:13:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-05 04:13:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1651. [2021-06-05 04:13:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 04:13:11,081 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 04:13:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:11,081 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 04:13:11,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 04:13:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:11,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:11,082 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:11,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22338 [2021-06-05 04:13:11,283 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:11,283 INFO L82 PathProgramCache]: Analyzing trace with hash -891850757, now seen corresponding path program 208 times [2021-06-05 04:13:11,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:11,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852841118] [2021-06-05 04:13:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:11,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:11,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852841118] [2021-06-05 04:13:11,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852841118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:11,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653487585] [2021-06-05 04:13:11,407 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:11,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:11,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:11,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:11,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:11,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:11,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:12,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:12,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:12,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:13:12,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:13:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:12,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653487585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:12,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:12,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:13:12,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301045945] [2021-06-05 04:13:12,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:13:12,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:12,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:13:12,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:13:12,112 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:12,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:12,563 INFO L93 Difference]: Finished difference Result 1678 states and 5309 transitions. [2021-06-05 04:13:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:13:12,563 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:13:12,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:12,565 INFO L225 Difference]: With dead ends: 1678 [2021-06-05 04:13:12,565 INFO L226 Difference]: Without dead ends: 1669 [2021-06-05 04:13:12,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:13:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-06-05 04:13:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1651. [2021-06-05 04:13:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.1854545454545455) internal successors, (5256), 1650 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5256 transitions. [2021-06-05 04:13:12,581 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5256 transitions. Word has length 19 [2021-06-05 04:13:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:12,581 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5256 transitions. [2021-06-05 04:13:12,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:12,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5256 transitions. [2021-06-05 04:13:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:12,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:12,583 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:12,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22765 [2021-06-05 04:13:12,783 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:12,784 INFO L82 PathProgramCache]: Analyzing trace with hash -148267397, now seen corresponding path program 209 times [2021-06-05 04:13:12,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:12,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763603298] [2021-06-05 04:13:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:12,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:12,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763603298] [2021-06-05 04:13:12,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763603298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:12,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028853169] [2021-06-05 04:13:12,878 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:12,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:13:12,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:12,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:13,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:13,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:13:14,318 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 214 [2021-06-05 04:13:15,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:13:15,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:15,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:15,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:15,589 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:13:15,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:13:15,590 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:13:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:15,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028853169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:15,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:15,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:13:15,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094740216] [2021-06-05 04:13:15,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:13:15,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:15,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:13:15,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:13:15,619 INFO L87 Difference]: Start difference. First operand 1651 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:16,269 INFO L93 Difference]: Finished difference Result 1770 states and 5538 transitions. [2021-06-05 04:13:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:13:16,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:13:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:16,271 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 04:13:16,271 INFO L226 Difference]: Without dead ends: 1760 [2021-06-05 04:13:16,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 515.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:13:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-06-05 04:13:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1651. [2021-06-05 04:13:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.1854545454545455) internal successors, (5256), 1650 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5256 transitions. [2021-06-05 04:13:16,289 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5256 transitions. Word has length 19 [2021-06-05 04:13:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:16,289 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5256 transitions. [2021-06-05 04:13:16,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5256 transitions. [2021-06-05 04:13:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:16,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:16,290 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:16,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22875,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:16,491 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:16,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:16,491 INFO L82 PathProgramCache]: Analyzing trace with hash 702876735, now seen corresponding path program 210 times [2021-06-05 04:13:16,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:16,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305244167] [2021-06-05 04:13:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:16,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:16,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305244167] [2021-06-05 04:13:16,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305244167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:16,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748243387] [2021-06-05 04:13:16,580 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:16,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:13:16,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:16,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:16,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:16,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:13:19,059 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 400 [2021-06-05 04:13:19,397 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 437 [2021-06-05 04:13:19,669 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 437 [2021-06-05 04:13:19,975 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 442 [2021-06-05 04:13:20,193 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 361 [2021-06-05 04:13:20,336 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 218 [2021-06-05 04:13:20,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:13:20,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:20,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:21,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:21,351 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:13:21,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:13:21,352 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:13:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:21,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748243387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:21,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:21,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:13:21,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002080458] [2021-06-05 04:13:21,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:13:21,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:21,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:13:21,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:13:21,380 INFO L87 Difference]: Start difference. First operand 1651 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:22,201 INFO L93 Difference]: Finished difference Result 1871 states and 5788 transitions. [2021-06-05 04:13:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:13:22,201 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:13:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:22,203 INFO L225 Difference]: With dead ends: 1871 [2021-06-05 04:13:22,204 INFO L226 Difference]: Without dead ends: 1861 [2021-06-05 04:13:22,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=240, Invalid=1922, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:13:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-06-05 04:13:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1631. [2021-06-05 04:13:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.1846625766871166) internal successors, (5191), 1630 states have internal predecessors, (5191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5191 transitions. [2021-06-05 04:13:22,221 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5191 transitions. Word has length 19 [2021-06-05 04:13:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:22,221 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5191 transitions. [2021-06-05 04:13:22,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5191 transitions. [2021-06-05 04:13:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:22,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:22,223 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:22,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23189 [2021-06-05 04:13:22,424 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:22,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1318541051, now seen corresponding path program 211 times [2021-06-05 04:13:22,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:22,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711586761] [2021-06-05 04:13:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:22,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:22,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711586761] [2021-06-05 04:13:22,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711586761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:22,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188745849] [2021-06-05 04:13:22,560 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:22,584 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:22,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:22,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:13:24,407 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 229 [2021-06-05 04:13:24,728 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 378 [2021-06-05 04:13:24,910 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 378 [2021-06-05 04:13:25,112 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 383 [2021-06-05 04:13:25,275 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 438 [2021-06-05 04:13:25,480 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 244 [2021-06-05 04:13:26,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:13:26,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:26,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:26,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:26,837 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:13:26,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:13:26,838 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:13:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:26,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188745849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:26,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:26,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:13:26,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030416266] [2021-06-05 04:13:26,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:13:26,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:26,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:13:26,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:26,867 INFO L87 Difference]: Start difference. First operand 1631 states and 5191 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:27,945 INFO L93 Difference]: Finished difference Result 1825 states and 5631 transitions. [2021-06-05 04:13:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:13:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:13:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:27,948 INFO L225 Difference]: With dead ends: 1825 [2021-06-05 04:13:27,948 INFO L226 Difference]: Without dead ends: 1813 [2021-06-05 04:13:27,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 893.9ms TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 04:13:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-06-05 04:13:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1647. [2021-06-05 04:13:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.1883353584447143) internal successors, (5248), 1646 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5248 transitions. [2021-06-05 04:13:27,966 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5248 transitions. Word has length 19 [2021-06-05 04:13:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:27,966 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5248 transitions. [2021-06-05 04:13:27,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5248 transitions. [2021-06-05 04:13:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:27,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:27,967 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:28,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23825,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:28,168 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1070701633, now seen corresponding path program 212 times [2021-06-05 04:13:28,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:28,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558464605] [2021-06-05 04:13:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:28,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:28,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558464605] [2021-06-05 04:13:28,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558464605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:28,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344589741] [2021-06-05 04:13:28,269 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:28,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:28,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:28,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:28,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:28,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:28,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:13:30,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:13:30,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:30,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:31,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:31,193 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:13:31,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:13:31,194 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:13:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:31,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344589741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:31,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:31,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:13:31,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038265321] [2021-06-05 04:13:31,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:13:31,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:31,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:13:31,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:13:31,223 INFO L87 Difference]: Start difference. First operand 1647 states and 5248 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:32,100 INFO L93 Difference]: Finished difference Result 1792 states and 5550 transitions. [2021-06-05 04:13:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:13:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:13:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:32,102 INFO L225 Difference]: With dead ends: 1792 [2021-06-05 04:13:32,102 INFO L226 Difference]: Without dead ends: 1780 [2021-06-05 04:13:32,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 842.3ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 04:13:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-06-05 04:13:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1649. [2021-06-05 04:13:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.183859223300971) internal successors, (5247), 1648 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5247 transitions. [2021-06-05 04:13:32,119 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5247 transitions. Word has length 19 [2021-06-05 04:13:32,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:32,119 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5247 transitions. [2021-06-05 04:13:32,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5247 transitions. [2021-06-05 04:13:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:32,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:32,139 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:32,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24317,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:32,345 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:32,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:32,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2122780805, now seen corresponding path program 213 times [2021-06-05 04:13:32,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:32,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537082861] [2021-06-05 04:13:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:32,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:32,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537082861] [2021-06-05 04:13:32,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537082861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:32,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406078304] [2021-06-05 04:13:32,454 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:32,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:13:32,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:32,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:32,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:32,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:32,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:13:33,380 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 251 [2021-06-05 04:13:33,490 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 251 [2021-06-05 04:13:33,607 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 262 [2021-06-05 04:13:33,855 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 329 [2021-06-05 04:13:33,966 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 282 [2021-06-05 04:13:34,089 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 246 [2021-06-05 04:13:34,952 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 276 [2021-06-05 04:13:35,093 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 304 [2021-06-05 04:13:35,357 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 354 [2021-06-05 04:13:35,712 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 452 [2021-06-05 04:13:36,138 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 492 [2021-06-05 04:13:36,621 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 535 [2021-06-05 04:13:37,117 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 535 [2021-06-05 04:13:37,632 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 701 DAG size of output: 540 [2021-06-05 04:13:37,937 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 427 [2021-06-05 04:13:38,175 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 310 [2021-06-05 04:13:38,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:13:38,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:38,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:38,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:38,890 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:13:38,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:13:38,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:13:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:38,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406078304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:38,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:38,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:13:38,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417792520] [2021-06-05 04:13:38,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:13:38,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:38,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:13:38,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:38,920 INFO L87 Difference]: Start difference. First operand 1649 states and 5247 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:39,777 INFO L93 Difference]: Finished difference Result 1801 states and 5581 transitions. [2021-06-05 04:13:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:13:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:13:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:39,779 INFO L225 Difference]: With dead ends: 1801 [2021-06-05 04:13:39,779 INFO L226 Difference]: Without dead ends: 1791 [2021-06-05 04:13:39,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 873.2ms TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:13:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-05 04:13:39,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1647. [2021-06-05 04:13:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.1859052247873634) internal successors, (5244), 1646 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5244 transitions. [2021-06-05 04:13:39,796 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5244 transitions. Word has length 19 [2021-06-05 04:13:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:39,796 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5244 transitions. [2021-06-05 04:13:39,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:39,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5244 transitions. [2021-06-05 04:13:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:39,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:39,798 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:39,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24781,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:39,999 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:39,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:39,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1987737538, now seen corresponding path program 214 times [2021-06-05 04:13:39,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:39,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020029134] [2021-06-05 04:13:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:40,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:40,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020029134] [2021-06-05 04:13:40,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020029134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:40,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377705486] [2021-06-05 04:13:40,042 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:40,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:40,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:40,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:40,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:40,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377705486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:40,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:40,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:40,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071836027] [2021-06-05 04:13:40,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:40,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:40,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:40,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:40,100 INFO L87 Difference]: Start difference. First operand 1647 states and 5244 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:40,202 INFO L93 Difference]: Finished difference Result 2586 states and 8045 transitions. [2021-06-05 04:13:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:13:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:13:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:40,205 INFO L225 Difference]: With dead ends: 2586 [2021-06-05 04:13:40,205 INFO L226 Difference]: Without dead ends: 2586 [2021-06-05 04:13:40,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:13:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-06-05 04:13:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2300. [2021-06-05 04:13:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.222270552414093) internal successors, (7408), 2299 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 7408 transitions. [2021-06-05 04:13:40,230 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 7408 transitions. Word has length 19 [2021-06-05 04:13:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:40,230 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 7408 transitions. [2021-06-05 04:13:40,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:40,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 7408 transitions. [2021-06-05 04:13:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:40,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:40,232 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:40,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25315 [2021-06-05 04:13:40,432 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:40,432 INFO L82 PathProgramCache]: Analyzing trace with hash -377496769, now seen corresponding path program 215 times [2021-06-05 04:13:40,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:40,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651657798] [2021-06-05 04:13:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:40,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:40,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651657798] [2021-06-05 04:13:40,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651657798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:40,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727117186] [2021-06-05 04:13:40,540 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:40,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:13:40,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:40,565 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:40,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:40,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:40,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:13:42,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:13:42,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:42,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:42,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:42,663 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:13:42,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:13:42,664 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:13:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:42,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727117186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:42,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:42,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:13:42,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724193574] [2021-06-05 04:13:42,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:13:42,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:42,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:13:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:42,692 INFO L87 Difference]: Start difference. First operand 2300 states and 7408 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:43,408 INFO L93 Difference]: Finished difference Result 2369 states and 7524 transitions. [2021-06-05 04:13:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:13:43,408 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:13:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:43,411 INFO L225 Difference]: With dead ends: 2369 [2021-06-05 04:13:43,411 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 04:13:43,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 836.2ms TimeCoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:13:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 04:13:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2300. [2021-06-05 04:13:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.222270552414093) internal successors, (7408), 2299 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 7408 transitions. [2021-06-05 04:13:43,435 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 7408 transitions. Word has length 19 [2021-06-05 04:13:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:43,435 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 7408 transitions. [2021-06-05 04:13:43,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 7408 transitions. [2021-06-05 04:13:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:43,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:43,437 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:43,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25316 [2021-06-05 04:13:43,638 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:43,638 INFO L82 PathProgramCache]: Analyzing trace with hash -504602600, now seen corresponding path program 216 times [2021-06-05 04:13:43,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:43,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738078221] [2021-06-05 04:13:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:43,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:43,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738078221] [2021-06-05 04:13:43,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738078221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:43,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784589954] [2021-06-05 04:13:43,683 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:43,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:13:43,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:43,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:43,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:43,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784589954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:43,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:43,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:43,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772408515] [2021-06-05 04:13:43,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:43,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:43,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:43,741 INFO L87 Difference]: Start difference. First operand 2300 states and 7408 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:43,888 INFO L93 Difference]: Finished difference Result 2557 states and 7954 transitions. [2021-06-05 04:13:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:13:43,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:13:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:43,891 INFO L225 Difference]: With dead ends: 2557 [2021-06-05 04:13:43,891 INFO L226 Difference]: Without dead ends: 2557 [2021-06-05 04:13:43,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:43,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-06-05 04:13:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2355. [2021-06-05 04:13:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.2196261682242993) internal successors, (7579), 2354 states have internal predecessors, (7579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7579 transitions. [2021-06-05 04:13:43,917 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7579 transitions. Word has length 19 [2021-06-05 04:13:43,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:43,917 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 7579 transitions. [2021-06-05 04:13:43,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7579 transitions. [2021-06-05 04:13:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:43,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:43,919 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:44,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25586,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:44,119 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:44,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2108266501, now seen corresponding path program 217 times [2021-06-05 04:13:44,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:44,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179842581] [2021-06-05 04:13:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:44,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:44,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179842581] [2021-06-05 04:13:44,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179842581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:44,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446832339] [2021-06-05 04:13:44,286 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:44,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:44,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:44,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:44,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:13:45,373 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 337 [2021-06-05 04:13:45,527 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 351 [2021-06-05 04:13:45,700 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 351 [2021-06-05 04:13:45,882 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 362 [2021-06-05 04:13:46,086 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 418 [2021-06-05 04:13:46,414 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 474 [2021-06-05 04:13:46,939 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 249 [2021-06-05 04:13:47,551 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 251 [2021-06-05 04:13:47,762 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 340 [2021-06-05 04:13:47,997 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 349 [2021-06-05 04:13:48,328 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 738 DAG size of output: 447 [2021-06-05 04:13:48,786 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 519 [2021-06-05 04:13:49,223 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 519 [2021-06-05 04:13:49,732 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 827 DAG size of output: 526 [2021-06-05 04:13:50,456 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 454 [2021-06-05 04:13:50,573 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-05 04:13:51,528 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 269 [2021-06-05 04:13:51,654 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 269 [2021-06-05 04:13:51,774 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 178 [2021-06-05 04:13:51,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:13:52,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:52,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:52,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:52,557 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:13:52,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:13:52,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:13:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:52,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446832339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:52,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:52,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:13:52,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341001363] [2021-06-05 04:13:52,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:13:52,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:52,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:13:52,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:52,587 INFO L87 Difference]: Start difference. First operand 2355 states and 7579 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:53,338 INFO L93 Difference]: Finished difference Result 2414 states and 7678 transitions. [2021-06-05 04:13:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:13:53,338 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:13:53,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:53,341 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 04:13:53,341 INFO L226 Difference]: Without dead ends: 2404 [2021-06-05 04:13:53,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 979.5ms TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:13:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-05 04:13:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2357. [2021-06-05 04:13:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2356 states have (on average 3.2181663837011882) internal successors, (7582), 2356 states have internal predecessors, (7582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 7582 transitions. [2021-06-05 04:13:53,366 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 7582 transitions. Word has length 19 [2021-06-05 04:13:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:53,366 INFO L482 AbstractCegarLoop]: Abstraction has 2357 states and 7582 transitions. [2021-06-05 04:13:53,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:13:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 7582 transitions. [2021-06-05 04:13:53,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:53,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:53,368 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:53,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25587 [2021-06-05 04:13:53,568 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:53,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1772059778, now seen corresponding path program 218 times [2021-06-05 04:13:53,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:53,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226610301] [2021-06-05 04:13:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:53,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:53,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226610301] [2021-06-05 04:13:53,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226610301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:53,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466232029] [2021-06-05 04:13:53,616 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:53,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:53,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:53,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:53,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:53,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466232029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:53,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:53,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:53,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179934396] [2021-06-05 04:13:53,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:53,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:53,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:53,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:53,675 INFO L87 Difference]: Start difference. First operand 2357 states and 7582 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:53,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:53,860 INFO L93 Difference]: Finished difference Result 2614 states and 8095 transitions. [2021-06-05 04:13:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:13:53,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:13:53,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:53,863 INFO L225 Difference]: With dead ends: 2614 [2021-06-05 04:13:53,863 INFO L226 Difference]: Without dead ends: 2614 [2021-06-05 04:13:53,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:13:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-06-05 04:13:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2378. [2021-06-05 04:13:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 3.216238956668069) internal successors, (7645), 2377 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 7645 transitions. [2021-06-05 04:13:53,890 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 7645 transitions. Word has length 19 [2021-06-05 04:13:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:53,890 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 7645 transitions. [2021-06-05 04:13:53,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 7645 transitions. [2021-06-05 04:13:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:53,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:53,892 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:54,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26380,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:54,092 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:54,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1053335259, now seen corresponding path program 219 times [2021-06-05 04:13:54,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:54,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664949942] [2021-06-05 04:13:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:54,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:54,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664949942] [2021-06-05 04:13:54,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664949942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:54,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108264230] [2021-06-05 04:13:54,197 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:54,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:13:54,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:54,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 04:13:54,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:54,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:54,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:54,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:54,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:54,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:13:54,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:13:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:54,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108264230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:54,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:54,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:13:54,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585522007] [2021-06-05 04:13:54,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:13:54,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:54,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:13:54,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:13:54,763 INFO L87 Difference]: Start difference. First operand 2378 states and 7645 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:55,147 INFO L93 Difference]: Finished difference Result 2419 states and 7720 transitions. [2021-06-05 04:13:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:13:55,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:13:55,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:55,150 INFO L225 Difference]: With dead ends: 2419 [2021-06-05 04:13:55,150 INFO L226 Difference]: Without dead ends: 2404 [2021-06-05 04:13:55,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:13:55,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-05 04:13:55,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2381. [2021-06-05 04:13:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.2147058823529413) internal successors, (7651), 2380 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:55,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 7651 transitions. [2021-06-05 04:13:55,176 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 7651 transitions. Word has length 19 [2021-06-05 04:13:55,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:55,176 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 7651 transitions. [2021-06-05 04:13:55,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:55,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 7651 transitions. [2021-06-05 04:13:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:55,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:55,178 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:55,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26381,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:55,378 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:55,378 INFO L82 PathProgramCache]: Analyzing trace with hash -201001835, now seen corresponding path program 220 times [2021-06-05 04:13:55,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:55,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310977696] [2021-06-05 04:13:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:55,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:55,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310977696] [2021-06-05 04:13:55,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310977696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:55,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552687430] [2021-06-05 04:13:55,490 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:55,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:55,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:55,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:55,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:55,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:55,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:13:56,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:56,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:56,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:13:56,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:13:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:56,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552687430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:56,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:56,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:13:56,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824920459] [2021-06-05 04:13:56,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:13:56,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:56,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:13:56,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:13:56,401 INFO L87 Difference]: Start difference. First operand 2381 states and 7651 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:56,875 INFO L93 Difference]: Finished difference Result 2420 states and 7731 transitions. [2021-06-05 04:13:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:13:56,876 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:13:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:56,878 INFO L225 Difference]: With dead ends: 2420 [2021-06-05 04:13:56,878 INFO L226 Difference]: Without dead ends: 2411 [2021-06-05 04:13:56,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:13:56,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-05 04:13:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2384. [2021-06-05 04:13:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 3.214435585396559) internal successors, (7660), 2383 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 7660 transitions. [2021-06-05 04:13:56,903 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 7660 transitions. Word has length 19 [2021-06-05 04:13:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:56,903 INFO L482 AbstractCegarLoop]: Abstraction has 2384 states and 7660 transitions. [2021-06-05 04:13:56,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 7660 transitions. [2021-06-05 04:13:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:56,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:56,904 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:57,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26477,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:57,105 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:57,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:57,105 INFO L82 PathProgramCache]: Analyzing trace with hash 542581525, now seen corresponding path program 221 times [2021-06-05 04:13:57,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:57,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707393814] [2021-06-05 04:13:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:57,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:57,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707393814] [2021-06-05 04:13:57,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707393814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:57,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841017901] [2021-06-05 04:13:57,214 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:57,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:13:57,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:57,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:13:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:57,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:57,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:13:58,747 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 224 [2021-06-05 04:13:58,892 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 312 [2021-06-05 04:13:59,055 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 331 [2021-06-05 04:13:59,217 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 331 [2021-06-05 04:13:59,401 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 338 [2021-06-05 04:13:59,690 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 384 [2021-06-05 04:14:00,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:00,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:00,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:01,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:01,185 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:01,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:01,186 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:01,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841017901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:01,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:01,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:14:01,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827097771] [2021-06-05 04:14:01,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:14:01,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:14:01,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:14:01,215 INFO L87 Difference]: Start difference. First operand 2384 states and 7660 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:01,623 INFO L93 Difference]: Finished difference Result 2508 states and 7952 transitions. [2021-06-05 04:14:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:14:01,623 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:01,626 INFO L225 Difference]: With dead ends: 2508 [2021-06-05 04:14:01,626 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 04:14:01,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:14:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 04:14:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2382. [2021-06-05 04:14:01,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 3.2150356992860143) internal successors, (7655), 2381 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 7655 transitions. [2021-06-05 04:14:01,651 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 7655 transitions. Word has length 19 [2021-06-05 04:14:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:01,652 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 7655 transitions. [2021-06-05 04:14:01,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 7655 transitions. [2021-06-05 04:14:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:01,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:01,653 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:01,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26589 [2021-06-05 04:14:01,854 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:01,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:01,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1500320577, now seen corresponding path program 222 times [2021-06-05 04:14:01,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:01,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284731883] [2021-06-05 04:14:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:01,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:01,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284731883] [2021-06-05 04:14:01,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284731883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:01,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183489729] [2021-06-05 04:14:01,962 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:01,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:14:01,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:01,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:01,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:02,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:02,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:03,487 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 244 [2021-06-05 04:14:03,604 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 269 [2021-06-05 04:14:03,733 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 240 [2021-06-05 04:14:04,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:04,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:04,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:04,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:04,883 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:04,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:04,884 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:04,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183489729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:04,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:04,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:14:04,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718353262] [2021-06-05 04:14:04,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:14:04,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:14:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:14:04,912 INFO L87 Difference]: Start difference. First operand 2382 states and 7655 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:14:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:05,804 INFO L93 Difference]: Finished difference Result 2503 states and 7954 transitions. [2021-06-05 04:14:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:14:05,804 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:14:05,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:05,806 INFO L225 Difference]: With dead ends: 2503 [2021-06-05 04:14:05,806 INFO L226 Difference]: Without dead ends: 2493 [2021-06-05 04:14:05,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 947.9ms TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:14:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-06-05 04:14:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2382. [2021-06-05 04:14:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 3.2150356992860143) internal successors, (7655), 2381 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 7655 transitions. [2021-06-05 04:14:05,831 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 7655 transitions. Word has length 19 [2021-06-05 04:14:05,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:05,831 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 7655 transitions. [2021-06-05 04:14:05,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:14:05,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 7655 transitions. [2021-06-05 04:14:05,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:05,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:05,833 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:06,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27140 [2021-06-05 04:14:06,033 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:06,034 INFO L82 PathProgramCache]: Analyzing trace with hash -440749611, now seen corresponding path program 223 times [2021-06-05 04:14:06,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:06,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263582248] [2021-06-05 04:14:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:06,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:06,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263582248] [2021-06-05 04:14:06,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263582248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:06,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469137848] [2021-06-05 04:14:06,120 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:06,143 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:06,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:06,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:06,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:07,488 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 210 [2021-06-05 04:14:07,601 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 239 [2021-06-05 04:14:07,713 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 239 [2021-06-05 04:14:07,837 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 244 [2021-06-05 04:14:07,944 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 241 [2021-06-05 04:14:08,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:08,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:08,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:08,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:08,982 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:08,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:08,983 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:09,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469137848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:09,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:09,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:14:09,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33712895] [2021-06-05 04:14:09,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:14:09,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:09,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:14:09,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:14:09,011 INFO L87 Difference]: Start difference. First operand 2382 states and 7655 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:09,887 INFO L93 Difference]: Finished difference Result 2624 states and 8231 transitions. [2021-06-05 04:14:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:14:09,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:09,890 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 04:14:09,890 INFO L226 Difference]: Without dead ends: 2612 [2021-06-05 04:14:09,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 803.8ms TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 04:14:09,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-05 04:14:09,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2395. [2021-06-05 04:14:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 04:14:09,916 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 04:14:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:09,916 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 04:14:09,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 04:14:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:09,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:09,918 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:10,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27516 [2021-06-05 04:14:10,118 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:10,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2136787431, now seen corresponding path program 224 times [2021-06-05 04:14:10,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:10,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652591729] [2021-06-05 04:14:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:10,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:10,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652591729] [2021-06-05 04:14:10,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652591729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:10,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522598992] [2021-06-05 04:14:10,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:10,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:10,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:10,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:10,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:10,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:10,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:11,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:11,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:11,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:12,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:12,275 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:12,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:12,275 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:12,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522598992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:12,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:12,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:14:12,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681898672] [2021-06-05 04:14:12,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:14:12,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:12,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:14:12,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:14:12,304 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:14:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:13,162 INFO L93 Difference]: Finished difference Result 2495 states and 7900 transitions. [2021-06-05 04:14:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:14:13,162 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:14:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:13,165 INFO L225 Difference]: With dead ends: 2495 [2021-06-05 04:14:13,165 INFO L226 Difference]: Without dead ends: 2485 [2021-06-05 04:14:13,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 965.0ms TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:14:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-05 04:14:13,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2395. [2021-06-05 04:14:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 04:14:13,190 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 04:14:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:13,190 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 04:14:13,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:14:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 04:14:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:13,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:13,192 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:13,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27878 [2021-06-05 04:14:13,392 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash 427410133, now seen corresponding path program 225 times [2021-06-05 04:14:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:13,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137556917] [2021-06-05 04:14:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:13,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:13,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137556917] [2021-06-05 04:14:13,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137556917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:13,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235812673] [2021-06-05 04:14:13,502 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:13,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:14:13,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:13,527 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:13,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:13,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:13,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:14,533 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 295 [2021-06-05 04:14:14,783 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 306 [2021-06-05 04:14:14,899 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 300 [2021-06-05 04:14:15,004 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 295 [2021-06-05 04:14:15,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:15,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:15,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:16,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:16,731 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:16,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:16,731 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:16,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235812673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:16,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:16,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:14:16,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42311271] [2021-06-05 04:14:16,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:14:16,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:16,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:14:16,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:14:16,760 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:14:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:17,631 INFO L93 Difference]: Finished difference Result 2453 states and 7797 transitions. [2021-06-05 04:14:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:14:17,632 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:14:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:17,634 INFO L225 Difference]: With dead ends: 2453 [2021-06-05 04:14:17,634 INFO L226 Difference]: Without dead ends: 2443 [2021-06-05 04:14:17,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 987.4ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:14:17,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-05 04:14:17,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 2395. [2021-06-05 04:14:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 04:14:17,660 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 04:14:17,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:17,660 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 04:14:17,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:14:17,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 04:14:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:17,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:17,662 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:17,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28250,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:17,865 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:17,865 INFO L82 PathProgramCache]: Analyzing trace with hash -906777413, now seen corresponding path program 226 times [2021-06-05 04:14:17,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:17,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818448321] [2021-06-05 04:14:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:17,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:17,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818448321] [2021-06-05 04:14:17,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818448321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:17,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357243411] [2021-06-05 04:14:17,988 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:18,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:18,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:18,014 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:18,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:18,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:19,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:19,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:19,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:14:19,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:14:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:19,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357243411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:19,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:19,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:14:19,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542602608] [2021-06-05 04:14:19,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:14:19,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:19,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:14:19,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:14:19,203 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:19,676 INFO L93 Difference]: Finished difference Result 2431 states and 7773 transitions. [2021-06-05 04:14:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:14:19,676 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:19,678 INFO L225 Difference]: With dead ends: 2431 [2021-06-05 04:14:19,678 INFO L226 Difference]: Without dead ends: 2422 [2021-06-05 04:14:19,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:14:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-05 04:14:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2396. [2021-06-05 04:14:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 3.215866388308977) internal successors, (7702), 2395 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7702 transitions. [2021-06-05 04:14:19,703 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7702 transitions. Word has length 19 [2021-06-05 04:14:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:19,703 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 7702 transitions. [2021-06-05 04:14:19,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7702 transitions. [2021-06-05 04:14:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:19,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:19,705 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:19,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28650 [2021-06-05 04:14:19,906 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:19,906 INFO L82 PathProgramCache]: Analyzing trace with hash -163194053, now seen corresponding path program 227 times [2021-06-05 04:14:19,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:19,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248033831] [2021-06-05 04:14:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:20,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:20,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248033831] [2021-06-05 04:14:20,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248033831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:20,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605140592] [2021-06-05 04:14:20,025 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:20,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:14:20,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:20,048 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:20,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:20,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:20,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:21,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:21,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:21,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:21,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:21,616 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:21,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:21,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:21,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605140592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:21,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:21,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:14:21,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058342838] [2021-06-05 04:14:21,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:14:21,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:21,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:14:21,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:14:21,647 INFO L87 Difference]: Start difference. First operand 2396 states and 7702 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:22,408 INFO L93 Difference]: Finished difference Result 2570 states and 8139 transitions. [2021-06-05 04:14:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:14:22,408 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:22,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:22,411 INFO L225 Difference]: With dead ends: 2570 [2021-06-05 04:14:22,411 INFO L226 Difference]: Without dead ends: 2560 [2021-06-05 04:14:22,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 536.3ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:14:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-06-05 04:14:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2395. [2021-06-05 04:14:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:22,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 04:14:22,437 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 04:14:22,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:22,437 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 04:14:22,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:22,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 04:14:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:22,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:22,439 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:22,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28834,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:22,639 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:22,639 INFO L82 PathProgramCache]: Analyzing trace with hash 687950079, now seen corresponding path program 228 times [2021-06-05 04:14:22,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:22,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779192808] [2021-06-05 04:14:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:22,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:22,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779192808] [2021-06-05 04:14:22,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779192808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:22,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224288558] [2021-06-05 04:14:22,743 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:22,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:14:22,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:22,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:22,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:23,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:23,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:24,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:24,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:24,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:24,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:24,931 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:24,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:24,932 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:24,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224288558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:24,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:24,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:14:24,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013905363] [2021-06-05 04:14:24,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:14:24,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:24,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:14:24,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:14:24,960 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:25,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:25,964 INFO L93 Difference]: Finished difference Result 2690 states and 8440 transitions. [2021-06-05 04:14:25,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:14:25,964 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:25,967 INFO L225 Difference]: With dead ends: 2690 [2021-06-05 04:14:25,967 INFO L226 Difference]: Without dead ends: 2680 [2021-06-05 04:14:25,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 816.1ms TimeCoverageRelationStatistics Valid=289, Invalid=2363, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 04:14:25,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-05 04:14:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2245. [2021-06-05 04:14:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.2076648841354722) internal successors, (7198), 2244 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7198 transitions. [2021-06-05 04:14:25,992 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7198 transitions. Word has length 19 [2021-06-05 04:14:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:25,992 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7198 transitions. [2021-06-05 04:14:25,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:25,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7198 transitions. [2021-06-05 04:14:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:25,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:25,994 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:26,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29092 [2021-06-05 04:14:26,194 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:26,194 INFO L82 PathProgramCache]: Analyzing trace with hash 26686296, now seen corresponding path program 229 times [2021-06-05 04:14:26,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:26,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580730559] [2021-06-05 04:14:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:26,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:26,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580730559] [2021-06-05 04:14:26,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580730559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:26,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330520669] [2021-06-05 04:14:26,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:14:26,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:26,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330520669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:26,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:26,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:14:26,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258688830] [2021-06-05 04:14:26,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:14:26,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:26,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:14:26,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:14:26,285 INFO L87 Difference]: Start difference. First operand 2245 states and 7198 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:26,360 INFO L93 Difference]: Finished difference Result 2914 states and 8965 transitions. [2021-06-05 04:14:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:14:26,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:26,363 INFO L225 Difference]: With dead ends: 2914 [2021-06-05 04:14:26,363 INFO L226 Difference]: Without dead ends: 2914 [2021-06-05 04:14:26,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:14:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2021-06-05 04:14:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2672. [2021-06-05 04:14:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 3.2100336952452264) internal successors, (8574), 2671 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 8574 transitions. [2021-06-05 04:14:26,394 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 8574 transitions. Word has length 19 [2021-06-05 04:14:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:26,394 INFO L482 AbstractCegarLoop]: Abstraction has 2672 states and 8574 transitions. [2021-06-05 04:14:26,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:26,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 8574 transitions. [2021-06-05 04:14:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:26,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:26,396 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:26,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29452,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:26,597 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:26,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1303614395, now seen corresponding path program 230 times [2021-06-05 04:14:26,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:26,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55266575] [2021-06-05 04:14:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:26,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:26,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55266575] [2021-06-05 04:14:26,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55266575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:26,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993679798] [2021-06-05 04:14:26,696 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:26,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:26,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:26,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:26,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:27,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:27,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:27,480 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 201 [2021-06-05 04:14:28,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:28,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:28,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:28,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:28,993 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:28,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:28,993 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:29,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993679798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:29,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:29,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:14:29,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905175762] [2021-06-05 04:14:29,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:14:29,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:29,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:14:29,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:14:29,021 INFO L87 Difference]: Start difference. First operand 2672 states and 8574 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:30,195 INFO L93 Difference]: Finished difference Result 3059 states and 9551 transitions. [2021-06-05 04:14:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 04:14:30,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:30,199 INFO L225 Difference]: With dead ends: 3059 [2021-06-05 04:14:30,199 INFO L226 Difference]: Without dead ends: 3049 [2021-06-05 04:14:30,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 976.1ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 04:14:30,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-05 04:14:30,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2623. [2021-06-05 04:14:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2622 states have (on average 3.2070938215102975) internal successors, (8409), 2622 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 8409 transitions. [2021-06-05 04:14:30,230 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 8409 transitions. Word has length 19 [2021-06-05 04:14:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:30,230 INFO L482 AbstractCegarLoop]: Abstraction has 2623 states and 8409 transitions. [2021-06-05 04:14:30,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 8409 transitions. [2021-06-05 04:14:30,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:30,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:30,232 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:30,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29453,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:30,433 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:30,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:30,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2034173506, now seen corresponding path program 231 times [2021-06-05 04:14:30,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:30,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064673404] [2021-06-05 04:14:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:30,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:30,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064673404] [2021-06-05 04:14:30,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064673404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:30,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340997782] [2021-06-05 04:14:30,471 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:30,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:14:30,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:30,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:14:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:30,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340997782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:30,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:30,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:14:30,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116160528] [2021-06-05 04:14:30,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:14:30,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:30,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:14:30,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:14:30,532 INFO L87 Difference]: Start difference. First operand 2623 states and 8409 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:30,630 INFO L93 Difference]: Finished difference Result 2885 states and 8823 transitions. [2021-06-05 04:14:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:14:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:30,633 INFO L225 Difference]: With dead ends: 2885 [2021-06-05 04:14:30,633 INFO L226 Difference]: Without dead ends: 2885 [2021-06-05 04:14:30,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-06-05 04:14:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2399. [2021-06-05 04:14:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 2398 states have (on average 3.187656380316931) internal successors, (7644), 2398 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 7644 transitions. [2021-06-05 04:14:30,662 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 7644 transitions. Word has length 19 [2021-06-05 04:14:30,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:30,662 INFO L482 AbstractCegarLoop]: Abstraction has 2399 states and 7644 transitions. [2021-06-05 04:14:30,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 7644 transitions. [2021-06-05 04:14:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:30,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:30,664 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:30,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29771 [2021-06-05 04:14:30,865 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:30,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1085628289, now seen corresponding path program 232 times [2021-06-05 04:14:30,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:30,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915006867] [2021-06-05 04:14:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:30,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:30,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915006867] [2021-06-05 04:14:30,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915006867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:30,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8766827] [2021-06-05 04:14:30,984 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:31,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:31,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:31,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:31,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:31,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:31,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:32,445 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 494 [2021-06-05 04:14:32,644 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 494 [2021-06-05 04:14:32,887 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 613 DAG size of output: 505 [2021-06-05 04:14:33,337 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 569 [2021-06-05 04:14:34,110 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 199 [2021-06-05 04:14:34,291 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 294 [2021-06-05 04:14:34,809 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 383 [2021-06-05 04:14:35,287 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 295 [2021-06-05 04:14:35,667 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 506 [2021-06-05 04:14:36,279 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 619 [2021-06-05 04:14:36,867 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 619 [2021-06-05 04:14:37,526 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 624 [2021-06-05 04:14:37,819 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 473 [2021-06-05 04:14:38,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:38,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:38,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:38,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:38,846 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:38,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:38,846 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:38,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8766827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:38,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:38,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:14:38,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412098936] [2021-06-05 04:14:38,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:14:38,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:38,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:14:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:14:38,875 INFO L87 Difference]: Start difference. First operand 2399 states and 7644 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:40,075 INFO L93 Difference]: Finished difference Result 2756 states and 8561 transitions. [2021-06-05 04:14:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 04:14:40,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:40,079 INFO L225 Difference]: With dead ends: 2756 [2021-06-05 04:14:40,079 INFO L226 Difference]: Without dead ends: 2744 [2021-06-05 04:14:40,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1063.9ms TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 04:14:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-06-05 04:14:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2477. [2021-06-05 04:14:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 3.1902261712439417) internal successors, (7899), 2476 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 7899 transitions. [2021-06-05 04:14:40,110 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 7899 transitions. Word has length 19 [2021-06-05 04:14:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:40,110 INFO L482 AbstractCegarLoop]: Abstraction has 2477 states and 7899 transitions. [2021-06-05 04:14:40,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 7899 transitions. [2021-06-05 04:14:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:40,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:40,112 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:40,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29772,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:40,312 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:40,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1496317928, now seen corresponding path program 233 times [2021-06-05 04:14:40,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:40,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038644327] [2021-06-05 04:14:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:40,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:40,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038644327] [2021-06-05 04:14:40,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038644327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:40,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591083214] [2021-06-05 04:14:40,359 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:40,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:14:40,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:40,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:14:40,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:40,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591083214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:40,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:40,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:14:40,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195569818] [2021-06-05 04:14:40,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:14:40,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:40,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:14:40,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:14:40,434 INFO L87 Difference]: Start difference. First operand 2477 states and 7899 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:40,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:40,558 INFO L93 Difference]: Finished difference Result 3089 states and 9579 transitions. [2021-06-05 04:14:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:14:40,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:40,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:40,562 INFO L225 Difference]: With dead ends: 3089 [2021-06-05 04:14:40,562 INFO L226 Difference]: Without dead ends: 3089 [2021-06-05 04:14:40,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-06-05 04:14:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2881. [2021-06-05 04:14:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.1899305555555557) internal successors, (9187), 2880 states have internal predecessors, (9187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9187 transitions. [2021-06-05 04:14:40,595 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9187 transitions. Word has length 19 [2021-06-05 04:14:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:40,596 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 9187 transitions. [2021-06-05 04:14:40,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:40,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9187 transitions. [2021-06-05 04:14:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:40,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:40,598 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:40,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30406,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:40,798 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:40,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2137707461, now seen corresponding path program 234 times [2021-06-05 04:14:40,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:40,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238003363] [2021-06-05 04:14:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:40,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:40,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238003363] [2021-06-05 04:14:40,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238003363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:40,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591317958] [2021-06-05 04:14:40,910 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:40,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:14:40,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:40,933 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:40,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:41,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:41,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:41,916 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 210 [2021-06-05 04:14:42,046 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 244 [2021-06-05 04:14:42,926 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 226 [2021-06-05 04:14:43,065 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 239 [2021-06-05 04:14:43,962 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 745 DAG size of output: 381 [2021-06-05 04:14:44,217 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 382 [2021-06-05 04:14:44,490 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 382 [2021-06-05 04:14:44,764 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 387 [2021-06-05 04:14:44,968 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 282 [2021-06-05 04:14:45,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:45,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:45,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:45,873 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 274 [2021-06-05 04:14:46,157 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 254 [2021-06-05 04:14:47,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:47,342 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:47,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:47,342 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:47,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591317958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:47,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:47,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:14:47,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43744737] [2021-06-05 04:14:47,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:14:47,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:14:47,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:14:47,372 INFO L87 Difference]: Start difference. First operand 2881 states and 9187 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:48,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:48,402 INFO L93 Difference]: Finished difference Result 3023 states and 9474 transitions. [2021-06-05 04:14:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:14:48,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:48,405 INFO L225 Difference]: With dead ends: 3023 [2021-06-05 04:14:48,405 INFO L226 Difference]: Without dead ends: 3013 [2021-06-05 04:14:48,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1042.9ms TimeCoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 04:14:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-06-05 04:14:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2883. [2021-06-05 04:14:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2882 states have (on average 3.1887578070784177) internal successors, (9190), 2882 states have internal predecessors, (9190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 9190 transitions. [2021-06-05 04:14:48,437 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 9190 transitions. Word has length 19 [2021-06-05 04:14:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:48,437 INFO L482 AbstractCegarLoop]: Abstraction has 2883 states and 9190 transitions. [2021-06-05 04:14:48,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 9190 transitions. [2021-06-05 04:14:48,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:48,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:48,439 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:48,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30407 [2021-06-05 04:14:48,640 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:48,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:48,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2002664194, now seen corresponding path program 235 times [2021-06-05 04:14:48,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:48,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381092723] [2021-06-05 04:14:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:48,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:48,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381092723] [2021-06-05 04:14:48,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381092723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:48,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938239951] [2021-06-05 04:14:48,680 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:14:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:48,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938239951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:48,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:48,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:14:48,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199221514] [2021-06-05 04:14:48,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:14:48,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:48,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:14:48,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:14:48,737 INFO L87 Difference]: Start difference. First operand 2883 states and 9190 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:48,805 INFO L93 Difference]: Finished difference Result 3131 states and 9825 transitions. [2021-06-05 04:14:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:14:48,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:48,808 INFO L225 Difference]: With dead ends: 3131 [2021-06-05 04:14:48,808 INFO L226 Difference]: Without dead ends: 3131 [2021-06-05 04:14:48,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-06-05 04:14:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3025. [2021-06-05 04:14:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 3.181878306878307) internal successors, (9622), 3024 states have internal predecessors, (9622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 9622 transitions. [2021-06-05 04:14:48,840 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 9622 transitions. Word has length 19 [2021-06-05 04:14:48,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:48,840 INFO L482 AbstractCegarLoop]: Abstraction has 3025 states and 9622 transitions. [2021-06-05 04:14:48,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 9622 transitions. [2021-06-05 04:14:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:48,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:48,843 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:49,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31140,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:49,043 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:49,043 INFO L82 PathProgramCache]: Analyzing trace with hash -392423425, now seen corresponding path program 236 times [2021-06-05 04:14:49,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:49,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11340110] [2021-06-05 04:14:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:49,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:49,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11340110] [2021-06-05 04:14:49,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11340110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:49,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760598818] [2021-06-05 04:14:49,153 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:49,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:49,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:49,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:49,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:49,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:49,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:50,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:50,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:50,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:51,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:52,002 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:52,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:52,003 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:52,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760598818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:52,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:52,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:14:52,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601828128] [2021-06-05 04:14:52,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:14:52,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:52,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:14:52,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:14:52,033 INFO L87 Difference]: Start difference. First operand 3025 states and 9622 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:14:53,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:53,031 INFO L93 Difference]: Finished difference Result 3173 states and 9925 transitions. [2021-06-05 04:14:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:14:53,031 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:14:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:53,034 INFO L225 Difference]: With dead ends: 3173 [2021-06-05 04:14:53,034 INFO L226 Difference]: Without dead ends: 3163 [2021-06-05 04:14:53,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1030.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1814, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:14:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-06-05 04:14:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3021. [2021-06-05 04:14:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3020 states have (on average 3.1841059602649007) internal successors, (9616), 3020 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 9616 transitions. [2021-06-05 04:14:53,067 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 9616 transitions. Word has length 19 [2021-06-05 04:14:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:53,067 INFO L482 AbstractCegarLoop]: Abstraction has 3021 states and 9616 transitions. [2021-06-05 04:14:53,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:14:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 9616 transitions. [2021-06-05 04:14:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:53,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:53,069 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:53,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31141 [2021-06-05 04:14:53,270 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:53,270 INFO L82 PathProgramCache]: Analyzing trace with hash -519529256, now seen corresponding path program 237 times [2021-06-05 04:14:53,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:53,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49031011] [2021-06-05 04:14:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:53,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:53,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49031011] [2021-06-05 04:14:53,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49031011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:53,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465617016] [2021-06-05 04:14:53,315 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:53,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:14:53,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:53,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:14:53,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:53,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465617016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:53,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:53,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:14:53,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757139747] [2021-06-05 04:14:53,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:14:53,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:53,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:14:53,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:14:53,375 INFO L87 Difference]: Start difference. First operand 3021 states and 9616 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:53,494 INFO L93 Difference]: Finished difference Result 3182 states and 9942 transitions. [2021-06-05 04:14:53,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:14:53,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:53,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:53,497 INFO L225 Difference]: With dead ends: 3182 [2021-06-05 04:14:53,497 INFO L226 Difference]: Without dead ends: 3182 [2021-06-05 04:14:53,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:14:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-05 04:14:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3046. [2021-06-05 04:14:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.182594417077176) internal successors, (9691), 3045 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 9691 transitions. [2021-06-05 04:14:53,529 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 9691 transitions. Word has length 19 [2021-06-05 04:14:53,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:53,529 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 9691 transitions. [2021-06-05 04:14:53,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:53,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 9691 transitions. [2021-06-05 04:14:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:53,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:53,531 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:53,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31481,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:53,732 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:53,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:53,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2123193157, now seen corresponding path program 238 times [2021-06-05 04:14:53,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:53,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510458924] [2021-06-05 04:14:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:53,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:53,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510458924] [2021-06-05 04:14:53,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510458924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:53,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371483727] [2021-06-05 04:14:53,841 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:53,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:53,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:53,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:53,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:54,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:54,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:55,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:14:55,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:55,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:14:56,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:56,102 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:14:56,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:14:56,102 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:14:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:56,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371483727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:56,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:56,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:14:56,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669815476] [2021-06-05 04:14:56,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:14:56,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:56,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:14:56,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:14:56,132 INFO L87 Difference]: Start difference. First operand 3046 states and 9691 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:14:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:57,004 INFO L93 Difference]: Finished difference Result 3126 states and 9832 transitions. [2021-06-05 04:14:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:14:57,004 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:14:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:57,007 INFO L225 Difference]: With dead ends: 3126 [2021-06-05 04:14:57,007 INFO L226 Difference]: Without dead ends: 3116 [2021-06-05 04:14:57,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 995.2ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:14:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-05 04:14:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3046. [2021-06-05 04:14:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.182594417077176) internal successors, (9691), 3045 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 9691 transitions. [2021-06-05 04:14:57,039 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 9691 transitions. Word has length 19 [2021-06-05 04:14:57,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:57,039 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 9691 transitions. [2021-06-05 04:14:57,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:14:57,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 9691 transitions. [2021-06-05 04:14:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:57,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:57,041 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:57,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31482,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:57,245 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1786986434, now seen corresponding path program 239 times [2021-06-05 04:14:57,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:57,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097077543] [2021-06-05 04:14:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:57,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:57,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097077543] [2021-06-05 04:14:57,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097077543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:57,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700170299] [2021-06-05 04:14:57,293 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:57,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:14:57,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:57,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:14:57,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:57,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700170299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:57,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:57,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:14:57,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244739754] [2021-06-05 04:14:57,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:14:57,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:57,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:14:57,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:14:57,353 INFO L87 Difference]: Start difference. First operand 3046 states and 9691 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:57,510 INFO L93 Difference]: Finished difference Result 3257 states and 10135 transitions. [2021-06-05 04:14:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:14:57,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:14:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:57,514 INFO L225 Difference]: With dead ends: 3257 [2021-06-05 04:14:57,514 INFO L226 Difference]: Without dead ends: 3257 [2021-06-05 04:14:57,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:14:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-06-05 04:14:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3085. [2021-06-05 04:14:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.180285343709468) internal successors, (9808), 3084 states have internal predecessors, (9808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 9808 transitions. [2021-06-05 04:14:57,547 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 9808 transitions. Word has length 19 [2021-06-05 04:14:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:57,547 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 9808 transitions. [2021-06-05 04:14:57,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 9808 transitions. [2021-06-05 04:14:57,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:14:57,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:57,549 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:57,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31804,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:57,750 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:57,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:57,750 INFO L82 PathProgramCache]: Analyzing trace with hash 57519999, now seen corresponding path program 240 times [2021-06-05 04:14:57,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:57,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526716081] [2021-06-05 04:14:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:57,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:57,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526716081] [2021-06-05 04:14:57,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526716081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:57,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111215654] [2021-06-05 04:14:57,859 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:57,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:14:57,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:57,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 04:14:57,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:58,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:58,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 04:14:58,756 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 203 [2021-06-05 04:14:59,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:15:00,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:00,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:15:00,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:00,342 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:15:00,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:15:00,342 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 04:15:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:00,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111215654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:00,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:00,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:15:00,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107955196] [2021-06-05 04:15:00,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:15:00,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:00,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:15:00,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:15:00,372 INFO L87 Difference]: Start difference. First operand 3085 states and 9808 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:15:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:01,259 INFO L93 Difference]: Finished difference Result 3146 states and 9913 transitions. [2021-06-05 04:15:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:15:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-05 04:15:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:01,262 INFO L225 Difference]: With dead ends: 3146 [2021-06-05 04:15:01,262 INFO L226 Difference]: Without dead ends: 3136 [2021-06-05 04:15:01,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1054.3ms TimeCoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:15:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-05 04:15:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 3087. [2021-06-05 04:15:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 3086 states have (on average 3.179196370706416) internal successors, (9811), 3086 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 9811 transitions. [2021-06-05 04:15:01,301 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 9811 transitions. Word has length 19 [2021-06-05 04:15:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:01,301 INFO L482 AbstractCegarLoop]: Abstraction has 3087 states and 9811 transitions. [2021-06-05 04:15:01,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 04:15:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 9811 transitions. [2021-06-05 04:15:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:15:01,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:01,303 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:01,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31805,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:01,503 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:01,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1871514008, now seen corresponding path program 241 times [2021-06-05 04:15:01,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:01,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042402460] [2021-06-05 04:15:01,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:01,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:01,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042402460] [2021-06-05 04:15:01,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042402460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:01,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283723851] [2021-06-05 04:15:01,556 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:01,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:15:01,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:01,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283723851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:01,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:01,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:15:01,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912168635] [2021-06-05 04:15:01,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:15:01,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:01,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:15:01,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:15:01,614 INFO L87 Difference]: Start difference. First operand 3087 states and 9811 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:01,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:01,788 INFO L93 Difference]: Finished difference Result 3398 states and 10507 transitions. [2021-06-05 04:15:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:15:01,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:15:01,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:01,792 INFO L225 Difference]: With dead ends: 3398 [2021-06-05 04:15:01,792 INFO L226 Difference]: Without dead ends: 3398 [2021-06-05 04:15:01,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=256, Invalid=500, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:15:01,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-06-05 04:15:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 3101. [2021-06-05 04:15:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.1783870967741934) internal successors, (9853), 3100 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9853 transitions. [2021-06-05 04:15:01,825 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9853 transitions. Word has length 19 [2021-06-05 04:15:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:01,825 INFO L482 AbstractCegarLoop]: Abstraction has 3101 states and 9853 transitions. [2021-06-05 04:15:01,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9853 transitions. [2021-06-05 04:15:01,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:01,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:01,827 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:02,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32229,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:02,028 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:02,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1968008967, now seen corresponding path program 242 times [2021-06-05 04:15:02,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:02,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014571739] [2021-06-05 04:15:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:02,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:02,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014571739] [2021-06-05 04:15:02,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014571739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:02,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781855495] [2021-06-05 04:15:02,144 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:02,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:15:02,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:02,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:15:02,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:02,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:02,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:03,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:03,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:03,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:03,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:15:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:03,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781855495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:03,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:03,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:15:03,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911443909] [2021-06-05 04:15:03,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:15:03,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:03,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:15:03,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:15:03,933 INFO L87 Difference]: Start difference. First operand 3101 states and 9853 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:15:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:04,355 INFO L93 Difference]: Finished difference Result 3193 states and 10066 transitions. [2021-06-05 04:15:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:15:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 20 [2021-06-05 04:15:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:04,359 INFO L225 Difference]: With dead ends: 3193 [2021-06-05 04:15:04,359 INFO L226 Difference]: Without dead ends: 3182 [2021-06-05 04:15:04,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:15:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-05 04:15:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3124. [2021-06-05 04:15:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.1777137367915467) internal successors, (9924), 3123 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 9924 transitions. [2021-06-05 04:15:04,394 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 9924 transitions. Word has length 20 [2021-06-05 04:15:04,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:04,394 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 9924 transitions. [2021-06-05 04:15:04,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:15:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 9924 transitions. [2021-06-05 04:15:04,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:04,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:04,396 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:04,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32230,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:04,597 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:04,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:04,597 INFO L82 PathProgramCache]: Analyzing trace with hash -750369269, now seen corresponding path program 243 times [2021-06-05 04:15:04,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:04,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179397128] [2021-06-05 04:15:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:04,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:04,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179397128] [2021-06-05 04:15:04,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179397128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:04,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405511331] [2021-06-05 04:15:04,692 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:04,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:15:04,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:04,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:15:04,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:05,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:05,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:06,592 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 326 [2021-06-05 04:15:06,781 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 326 [2021-06-05 04:15:07,016 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 331 [2021-06-05 04:15:07,306 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 404 [2021-06-05 04:15:07,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:07,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:07,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:07,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:15:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:07,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405511331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:07,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:07,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:15:07,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738508717] [2021-06-05 04:15:07,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:15:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:15:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:15:07,880 INFO L87 Difference]: Start difference. First operand 3124 states and 9924 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 04:15:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:08,330 INFO L93 Difference]: Finished difference Result 3211 states and 10096 transitions. [2021-06-05 04:15:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:15:08,330 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-06-05 04:15:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:08,334 INFO L225 Difference]: With dead ends: 3211 [2021-06-05 04:15:08,334 INFO L226 Difference]: Without dead ends: 3206 [2021-06-05 04:15:08,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 401.1ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:15:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-06-05 04:15:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3124. [2021-06-05 04:15:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.1777137367915467) internal successors, (9924), 3123 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 9924 transitions. [2021-06-05 04:15:08,368 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 9924 transitions. Word has length 20 [2021-06-05 04:15:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:08,368 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 9924 transitions. [2021-06-05 04:15:08,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 04:15:08,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 9924 transitions. [2021-06-05 04:15:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:08,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:08,371 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:08,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32498 [2021-06-05 04:15:08,573 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1411633052, now seen corresponding path program 244 times [2021-06-05 04:15:08,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:08,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108767686] [2021-06-05 04:15:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:08,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:08,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108767686] [2021-06-05 04:15:08,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108767686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:08,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757276805] [2021-06-05 04:15:08,619 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:08,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:15:08,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:15:08,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:08,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757276805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:08,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:08,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:15:08,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411834303] [2021-06-05 04:15:08,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:15:08,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:08,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:15:08,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:15:08,692 INFO L87 Difference]: Start difference. First operand 3124 states and 9924 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 04:15:08,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:08,758 INFO L93 Difference]: Finished difference Result 3606 states and 10977 transitions. [2021-06-05 04:15:08,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:15:08,759 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 20 [2021-06-05 04:15:08,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:08,763 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 04:15:08,763 INFO L226 Difference]: Without dead ends: 3606 [2021-06-05 04:15:08,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:15:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-06-05 04:15:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3155. [2021-06-05 04:15:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 3.182625237793278) internal successors, (10038), 3154 states have internal predecessors, (10038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 10038 transitions. [2021-06-05 04:15:08,803 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 10038 transitions. Word has length 20 [2021-06-05 04:15:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:08,803 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 10038 transitions. [2021-06-05 04:15:08,803 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 04:15:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 10038 transitions. [2021-06-05 04:15:08,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:08,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:08,806 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:09,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32792 [2021-06-05 04:15:09,006 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:09,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:09,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1981379847, now seen corresponding path program 245 times [2021-06-05 04:15:09,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:09,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635734762] [2021-06-05 04:15:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:09,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:09,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635734762] [2021-06-05 04:15:09,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635734762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:09,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270064550] [2021-06-05 04:15:09,100 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:09,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:15:09,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:09,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:15:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:09,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:09,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:10,198 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 282 [2021-06-05 04:15:10,454 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 280 [2021-06-05 04:15:10,582 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 276 [2021-06-05 04:15:10,926 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 352 [2021-06-05 04:15:12,064 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 315 [2021-06-05 04:15:12,229 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 356 [2021-06-05 04:15:12,428 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 367 [2021-06-05 04:15:12,642 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 732 DAG size of output: 386 [2021-06-05 04:15:12,859 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 732 DAG size of output: 386 [2021-06-05 04:15:13,097 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 737 DAG size of output: 391 [2021-06-05 04:15:13,255 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 330 [2021-06-05 04:15:13,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:13,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:13,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:13,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:15:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:13,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270064550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:13,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:13,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:15:13,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671863523] [2021-06-05 04:15:13,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:15:13,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:13,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:15:13,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:15:13,616 INFO L87 Difference]: Start difference. First operand 3155 states and 10038 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:15:13,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:13,984 INFO L93 Difference]: Finished difference Result 3260 states and 10216 transitions. [2021-06-05 04:15:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:15:13,984 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 04:15:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:13,988 INFO L225 Difference]: With dead ends: 3260 [2021-06-05 04:15:13,988 INFO L226 Difference]: Without dead ends: 3251 [2021-06-05 04:15:13,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:15:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-05 04:15:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 3158. [2021-06-05 04:15:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 3.1821349382324993) internal successors, (10046), 3157 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 10046 transitions. [2021-06-05 04:15:14,029 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 10046 transitions. Word has length 20 [2021-06-05 04:15:14,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:14,030 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 10046 transitions. [2021-06-05 04:15:14,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:15:14,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 10046 transitions. [2021-06-05 04:15:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:14,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:14,032 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:14,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32793,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:14,233 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:14,233 INFO L82 PathProgramCache]: Analyzing trace with hash 853983754, now seen corresponding path program 246 times [2021-06-05 04:15:14,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:14,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454618568] [2021-06-05 04:15:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:14,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454618568] [2021-06-05 04:15:14,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454618568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037789616] [2021-06-05 04:15:14,281 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:14,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:15:14,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:14,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:15:14,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:14,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037789616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:14,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:14,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:15:14,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024199938] [2021-06-05 04:15:14,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:15:14,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:14,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:15:14,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:15:14,355 INFO L87 Difference]: Start difference. First operand 3158 states and 10046 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 04:15:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:14,459 INFO L93 Difference]: Finished difference Result 3782 states and 11476 transitions. [2021-06-05 04:15:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:15:14,459 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 20 [2021-06-05 04:15:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:14,464 INFO L225 Difference]: With dead ends: 3782 [2021-06-05 04:15:14,464 INFO L226 Difference]: Without dead ends: 3782 [2021-06-05 04:15:14,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:15:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2021-06-05 04:15:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 3158. [2021-06-05 04:15:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 3.1821349382324993) internal successors, (10046), 3157 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 10046 transitions. [2021-06-05 04:15:14,508 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 10046 transitions. Word has length 20 [2021-06-05 04:15:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:14,508 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 10046 transitions. [2021-06-05 04:15:14,508 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 04:15:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 10046 transitions. [2021-06-05 04:15:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:14,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:14,510 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:14,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33222 [2021-06-05 04:15:14,711 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:14,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:14,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1336798777, now seen corresponding path program 247 times [2021-06-05 04:15:14,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:14,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244556889] [2021-06-05 04:15:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:14,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:14,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244556889] [2021-06-05 04:15:14,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244556889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:14,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123343854] [2021-06-05 04:15:14,822 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:14,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:15:14,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:15,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:15,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:16,080 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 358 [2021-06-05 04:15:16,234 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 358 [2021-06-05 04:15:16,419 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 370 [2021-06-05 04:15:16,652 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 413 [2021-06-05 04:15:17,315 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 372 [2021-06-05 04:15:18,027 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 325 [2021-06-05 04:15:18,202 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 402 [2021-06-05 04:15:18,544 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 503 [2021-06-05 04:15:18,859 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 503 [2021-06-05 04:15:19,248 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 644 DAG size of output: 521 [2021-06-05 04:15:19,635 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 412 [2021-06-05 04:15:19,790 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 350 [2021-06-05 04:15:19,947 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 268 [2021-06-05 04:15:20,666 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 229 [2021-06-05 04:15:21,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:21,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:21,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:21,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:15:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:21,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123343854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:21,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:21,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:15:21,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071290546] [2021-06-05 04:15:21,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:15:21,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:21,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:15:21,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:15:21,038 INFO L87 Difference]: Start difference. First operand 3158 states and 10046 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:15:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:21,384 INFO L93 Difference]: Finished difference Result 3264 states and 10240 transitions. [2021-06-05 04:15:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:15:21,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 04:15:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:21,388 INFO L225 Difference]: With dead ends: 3264 [2021-06-05 04:15:21,388 INFO L226 Difference]: Without dead ends: 3257 [2021-06-05 04:15:21,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:15:21,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-06-05 04:15:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3161. [2021-06-05 04:15:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 3.1825949367088606) internal successors, (10057), 3160 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 10057 transitions. [2021-06-05 04:15:21,425 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 10057 transitions. Word has length 20 [2021-06-05 04:15:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:21,425 INFO L482 AbstractCegarLoop]: Abstraction has 3161 states and 10057 transitions. [2021-06-05 04:15:21,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:15:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 10057 transitions. [2021-06-05 04:15:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:21,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:21,427 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:21,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33223,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:21,628 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:21,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1830772426, now seen corresponding path program 248 times [2021-06-05 04:15:21,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:21,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168222831] [2021-06-05 04:15:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:21,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:21,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168222831] [2021-06-05 04:15:21,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168222831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:21,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426309019] [2021-06-05 04:15:21,672 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:21,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:15:21,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:21,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:15:21,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:21,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426309019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:21,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:21,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:15:21,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214497968] [2021-06-05 04:15:21,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:15:21,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:21,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:15:21,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:15:21,736 INFO L87 Difference]: Start difference. First operand 3161 states and 10057 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 04:15:21,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:21,813 INFO L93 Difference]: Finished difference Result 3795 states and 11521 transitions. [2021-06-05 04:15:21,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:15:21,814 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 20 [2021-06-05 04:15:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:21,818 INFO L225 Difference]: With dead ends: 3795 [2021-06-05 04:15:21,818 INFO L226 Difference]: Without dead ends: 3795 [2021-06-05 04:15:21,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:15:21,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-05 04:15:21,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 3140. [2021-06-05 04:15:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 3.1815864925135395) internal successors, (9987), 3139 states have internal predecessors, (9987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 9987 transitions. [2021-06-05 04:15:21,857 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 9987 transitions. Word has length 20 [2021-06-05 04:15:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:21,857 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 9987 transitions. [2021-06-05 04:15:21,857 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 04:15:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 9987 transitions. [2021-06-05 04:15:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:21,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:21,859 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:22,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33619 [2021-06-05 04:15:22,062 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:22,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:22,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1926339292, now seen corresponding path program 249 times [2021-06-05 04:15:22,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:22,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304357190] [2021-06-05 04:15:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:22,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:22,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304357190] [2021-06-05 04:15:22,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304357190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:22,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986076317] [2021-06-05 04:15:22,108 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:22,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:15:22,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:22,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:15:22,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:22,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986076317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:22,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:22,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:15:22,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937386057] [2021-06-05 04:15:22,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:15:22,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:22,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:15:22,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:15:22,171 INFO L87 Difference]: Start difference. First operand 3140 states and 9987 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:22,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:22,281 INFO L93 Difference]: Finished difference Result 4051 states and 12203 transitions. [2021-06-05 04:15:22,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:15:22,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:15:22,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:22,286 INFO L225 Difference]: With dead ends: 4051 [2021-06-05 04:15:22,286 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 04:15:22,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:15:22,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 04:15:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3009. [2021-06-05 04:15:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 3.171542553191489) internal successors, (9540), 3008 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 9540 transitions. [2021-06-05 04:15:22,323 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 9540 transitions. Word has length 20 [2021-06-05 04:15:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:22,323 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 9540 transitions. [2021-06-05 04:15:22,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 9540 transitions. [2021-06-05 04:15:22,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:22,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:22,326 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:22,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33620 [2021-06-05 04:15:22,537 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash -393864147, now seen corresponding path program 250 times [2021-06-05 04:15:22,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:22,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366880269] [2021-06-05 04:15:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:22,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:22,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366880269] [2021-06-05 04:15:22,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366880269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:22,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789294539] [2021-06-05 04:15:22,617 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:22,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:15:22,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:22,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:15:22,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:22,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:22,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:23,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:23,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:23,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:23,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:15:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:23,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789294539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:23,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:23,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:15:23,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124699714] [2021-06-05 04:15:23,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:15:23,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:15:23,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:15:23,874 INFO L87 Difference]: Start difference. First operand 3009 states and 9540 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:24,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:24,418 INFO L93 Difference]: Finished difference Result 3118 states and 9737 transitions. [2021-06-05 04:15:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:15:24,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:15:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:24,422 INFO L225 Difference]: With dead ends: 3118 [2021-06-05 04:15:24,422 INFO L226 Difference]: Without dead ends: 3095 [2021-06-05 04:15:24,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:15:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-06-05 04:15:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 3011. [2021-06-05 04:15:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 3.167441860465116) internal successors, (9534), 3010 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 9534 transitions. [2021-06-05 04:15:24,456 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 9534 transitions. Word has length 20 [2021-06-05 04:15:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:24,456 INFO L482 AbstractCegarLoop]: Abstraction has 3011 states and 9534 transitions. [2021-06-05 04:15:24,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 9534 transitions. [2021-06-05 04:15:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:24,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:24,458 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:24,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33621 [2021-06-05 04:15:24,659 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1511860465, now seen corresponding path program 251 times [2021-06-05 04:15:24,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:24,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757577909] [2021-06-05 04:15:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:24,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:24,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757577909] [2021-06-05 04:15:24,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757577909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:24,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212594446] [2021-06-05 04:15:24,741 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:24,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:15:24,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:24,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 04:15:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:25,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:25,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:26,240 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 252 [2021-06-05 04:15:26,366 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 252 [2021-06-05 04:15:26,505 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 258 [2021-06-05 04:15:27,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:27,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:27,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:27,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:15:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:27,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212594446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:27,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:27,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:15:27,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627020165] [2021-06-05 04:15:27,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:15:27,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:27,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:15:27,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:15:27,387 INFO L87 Difference]: Start difference. First operand 3011 states and 9534 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:27,685 INFO L93 Difference]: Finished difference Result 3095 states and 9704 transitions. [2021-06-05 04:15:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:15:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:15:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:27,688 INFO L225 Difference]: With dead ends: 3095 [2021-06-05 04:15:27,688 INFO L226 Difference]: Without dead ends: 3090 [2021-06-05 04:15:27,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:15:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2021-06-05 04:15:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 3011. [2021-06-05 04:15:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 3.167441860465116) internal successors, (9534), 3010 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 9534 transitions. [2021-06-05 04:15:27,720 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 9534 transitions. Word has length 20 [2021-06-05 04:15:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:27,720 INFO L482 AbstractCegarLoop]: Abstraction has 3011 states and 9534 transitions. [2021-06-05 04:15:27,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 9534 transitions. [2021-06-05 04:15:27,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:27,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:27,722 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:27,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33775 [2021-06-05 04:15:27,922 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1121121017, now seen corresponding path program 252 times [2021-06-05 04:15:27,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:27,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51250649] [2021-06-05 04:15:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:28,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:28,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51250649] [2021-06-05 04:15:28,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51250649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:28,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754591468] [2021-06-05 04:15:28,014 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:28,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:15:28,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:28,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:15:28,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:28,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:28,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:29,056 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-06-05 04:15:29,174 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-06-05 04:15:29,313 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 288 [2021-06-05 04:15:29,630 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 369 [2021-06-05 04:15:30,007 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 332 [2021-06-05 04:15:30,118 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 269 [2021-06-05 04:15:30,764 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 243 [2021-06-05 04:15:30,906 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 310 [2021-06-05 04:15:31,075 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 329 [2021-06-05 04:15:31,851 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 257 [2021-06-05 04:15:31,988 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 332 [2021-06-05 04:15:32,257 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 469 [2021-06-05 04:15:32,710 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 554 [2021-06-05 04:15:33,192 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 554 [2021-06-05 04:15:33,859 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 1053 DAG size of output: 561 [2021-06-05 04:15:34,078 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 305 [2021-06-05 04:15:34,417 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 341 [2021-06-05 04:15:34,526 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 250 [2021-06-05 04:15:34,944 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 244 [2021-06-05 04:15:35,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:35,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:35,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:35,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:15:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:35,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754591468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:35,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:35,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:15:35,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302082879] [2021-06-05 04:15:35,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:15:35,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:35,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:15:35,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:15:35,184 INFO L87 Difference]: Start difference. First operand 3011 states and 9534 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:15:35,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:35,525 INFO L93 Difference]: Finished difference Result 3110 states and 9713 transitions. [2021-06-05 04:15:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:15:35,525 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 04:15:35,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:35,529 INFO L225 Difference]: With dead ends: 3110 [2021-06-05 04:15:35,529 INFO L226 Difference]: Without dead ends: 3101 [2021-06-05 04:15:35,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:15:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-05 04:15:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 3010. [2021-06-05 04:15:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 3.1665004985044867) internal successors, (9528), 3009 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 9528 transitions. [2021-06-05 04:15:35,562 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 9528 transitions. Word has length 20 [2021-06-05 04:15:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:35,562 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 9528 transitions. [2021-06-05 04:15:35,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:15:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 9528 transitions. [2021-06-05 04:15:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:35,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:35,564 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:35,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34134 [2021-06-05 04:15:35,765 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:35,765 INFO L82 PathProgramCache]: Analyzing trace with hash -187657308, now seen corresponding path program 253 times [2021-06-05 04:15:35,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:35,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562272914] [2021-06-05 04:15:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:35,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:35,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562272914] [2021-06-05 04:15:35,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562272914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:35,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460585950] [2021-06-05 04:15:35,802 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:15:35,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:15:35,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460585950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:35,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:35,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:15:35,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812235669] [2021-06-05 04:15:35,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:15:35,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:35,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:15:35,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:15:35,857 INFO L87 Difference]: Start difference. First operand 3010 states and 9528 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:35,921 INFO L93 Difference]: Finished difference Result 3282 states and 10018 transitions. [2021-06-05 04:15:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:15:35,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:15:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:35,924 INFO L225 Difference]: With dead ends: 3282 [2021-06-05 04:15:35,924 INFO L226 Difference]: Without dead ends: 3282 [2021-06-05 04:15:35,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:15:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-06-05 04:15:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3032. [2021-06-05 04:15:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.167601451666117) internal successors, (9601), 3031 states have internal predecessors, (9601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 9601 transitions. [2021-06-05 04:15:35,958 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 9601 transitions. Word has length 20 [2021-06-05 04:15:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:35,958 INFO L482 AbstractCegarLoop]: Abstraction has 3032 states and 9601 transitions. [2021-06-05 04:15:35,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 9601 transitions. [2021-06-05 04:15:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:35,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:35,961 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:36,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34552,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:36,161 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2046450186, now seen corresponding path program 254 times [2021-06-05 04:15:36,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:36,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371940077] [2021-06-05 04:15:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:36,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371940077] [2021-06-05 04:15:36,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371940077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732169438] [2021-06-05 04:15:36,203 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:36,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:15:36,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:36,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:15:36,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:36,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732169438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:36,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:36,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:15:36,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420026793] [2021-06-05 04:15:36,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:15:36,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:36,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:15:36,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:15:36,259 INFO L87 Difference]: Start difference. First operand 3032 states and 9601 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 04:15:36,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:36,339 INFO L93 Difference]: Finished difference Result 3444 states and 10441 transitions. [2021-06-05 04:15:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:15:36,339 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 20 [2021-06-05 04:15:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:36,343 INFO L225 Difference]: With dead ends: 3444 [2021-06-05 04:15:36,343 INFO L226 Difference]: Without dead ends: 3444 [2021-06-05 04:15:36,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:15:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2021-06-05 04:15:36,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3015. [2021-06-05 04:15:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 3.1648971466489715) internal successors, (9539), 3014 states have internal predecessors, (9539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 9539 transitions. [2021-06-05 04:15:36,377 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 9539 transitions. Word has length 20 [2021-06-05 04:15:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:36,377 INFO L482 AbstractCegarLoop]: Abstraction has 3015 states and 9539 transitions. [2021-06-05 04:15:36,377 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 04:15:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 9539 transitions. [2021-06-05 04:15:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:36,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:36,379 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:36,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34553 [2021-06-05 04:15:36,579 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:36,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1710661532, now seen corresponding path program 255 times [2021-06-05 04:15:36,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:36,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476861062] [2021-06-05 04:15:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:36,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:36,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476861062] [2021-06-05 04:15:36,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476861062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:36,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988555513] [2021-06-05 04:15:36,623 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:36,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:15:36,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:36,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:15:36,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:36,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988555513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:36,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:36,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:15:36,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841956731] [2021-06-05 04:15:36,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:15:36,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:36,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:15:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:15:36,687 INFO L87 Difference]: Start difference. First operand 3015 states and 9539 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:36,793 INFO L93 Difference]: Finished difference Result 3807 states and 11446 transitions. [2021-06-05 04:15:36,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:15:36,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:15:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:36,797 INFO L225 Difference]: With dead ends: 3807 [2021-06-05 04:15:36,797 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 04:15:36,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:15:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 04:15:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2940. [2021-06-05 04:15:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2939 states have (on average 3.159918339571283) internal successors, (9287), 2939 states have internal predecessors, (9287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 9287 transitions. [2021-06-05 04:15:36,833 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 9287 transitions. Word has length 20 [2021-06-05 04:15:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:36,833 INFO L482 AbstractCegarLoop]: Abstraction has 2940 states and 9287 transitions. [2021-06-05 04:15:36,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 9287 transitions. [2021-06-05 04:15:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:36,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:36,836 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:37,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34554 [2021-06-05 04:15:37,036 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:37,036 INFO L82 PathProgramCache]: Analyzing trace with hash 2077959498, now seen corresponding path program 256 times [2021-06-05 04:15:37,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:37,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582407704] [2021-06-05 04:15:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:37,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:37,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582407704] [2021-06-05 04:15:37,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582407704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:37,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089763502] [2021-06-05 04:15:37,083 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:37,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:15:37,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:37,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:15:37,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:37,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089763502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:37,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:37,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:15:37,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527534242] [2021-06-05 04:15:37,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:15:37,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:37,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:15:37,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:15:37,145 INFO L87 Difference]: Start difference. First operand 2940 states and 9287 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:37,293 INFO L93 Difference]: Finished difference Result 4596 states and 14016 transitions. [2021-06-05 04:15:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:15:37,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:15:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:37,298 INFO L225 Difference]: With dead ends: 4596 [2021-06-05 04:15:37,299 INFO L226 Difference]: Without dead ends: 4596 [2021-06-05 04:15:37,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:15:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2021-06-05 04:15:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 3707. [2021-06-05 04:15:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3707 states, 3706 states have (on average 3.1813275769023206) internal successors, (11790), 3706 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3707 states to 3707 states and 11790 transitions. [2021-06-05 04:15:37,346 INFO L78 Accepts]: Start accepts. Automaton has 3707 states and 11790 transitions. Word has length 20 [2021-06-05 04:15:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:37,346 INFO L482 AbstractCegarLoop]: Abstraction has 3707 states and 11790 transitions. [2021-06-05 04:15:37,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3707 states and 11790 transitions. [2021-06-05 04:15:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:37,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:37,349 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:37,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34555,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:37,549 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2063705743, now seen corresponding path program 257 times [2021-06-05 04:15:37,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:37,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246441378] [2021-06-05 04:15:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:15:37,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:37,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246441378] [2021-06-05 04:15:37,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246441378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:37,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7035455] [2021-06-05 04:15:37,618 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:37,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:15:37,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:37,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:15:37,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:37,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:37,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:38,359 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 265 [2021-06-05 04:15:38,643 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 286 [2021-06-05 04:15:38,799 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 284 [2021-06-05 04:15:39,007 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 305 [2021-06-05 04:15:39,139 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 212 [2021-06-05 04:15:39,273 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 278 [2021-06-05 04:15:39,719 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 268 [2021-06-05 04:15:39,846 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 191 [2021-06-05 04:15:40,425 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 256 [2021-06-05 04:15:40,626 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 267 [2021-06-05 04:15:40,827 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 267 [2021-06-05 04:15:41,048 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 272 [2021-06-05 04:15:41,234 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 316 [2021-06-05 04:15:42,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:42,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:42,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:42,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:15:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:42,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7035455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:42,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:42,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 04:15:42,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535750927] [2021-06-05 04:15:42,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:15:42,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:42,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:15:42,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:15:42,098 INFO L87 Difference]: Start difference. First operand 3707 states and 11790 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 04:15:42,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:42,357 INFO L93 Difference]: Finished difference Result 3745 states and 11853 transitions. [2021-06-05 04:15:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:15:42,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:15:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:42,361 INFO L225 Difference]: With dead ends: 3745 [2021-06-05 04:15:42,361 INFO L226 Difference]: Without dead ends: 3721 [2021-06-05 04:15:42,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:15:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-06-05 04:15:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3708. [2021-06-05 04:15:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 3.1810089020771515) internal successors, (11792), 3707 states have internal predecessors, (11792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:42,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 11792 transitions. [2021-06-05 04:15:42,403 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 11792 transitions. Word has length 20 [2021-06-05 04:15:42,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:42,403 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 11792 transitions. [2021-06-05 04:15:42,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 04:15:42,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 11792 transitions. [2021-06-05 04:15:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:42,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:42,405 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:42,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34556 [2021-06-05 04:15:42,606 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:42,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:42,606 INFO L82 PathProgramCache]: Analyzing trace with hash 875393611, now seen corresponding path program 258 times [2021-06-05 04:15:42,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:42,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222843816] [2021-06-05 04:15:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:42,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:42,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222843816] [2021-06-05 04:15:42,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222843816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:42,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854673894] [2021-06-05 04:15:42,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:42,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:15:42,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:42,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:15:42,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:43,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:43,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:43,916 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 329 [2021-06-05 04:15:44,021 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 262 [2021-06-05 04:15:44,287 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 293 [2021-06-05 04:15:45,233 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 281 [2021-06-05 04:15:45,461 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 416 [2021-06-05 04:15:45,708 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 471 [2021-06-05 04:15:45,956 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 471 [2021-06-05 04:15:46,257 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 476 [2021-06-05 04:15:46,577 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 525 [2021-06-05 04:15:47,147 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 477 [2021-06-05 04:15:47,732 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 281 [2021-06-05 04:15:47,837 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 281 [2021-06-05 04:15:47,952 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 283 [2021-06-05 04:15:48,084 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 256 [2021-06-05 04:15:48,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:48,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:48,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:48,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:15:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:48,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854673894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:48,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:48,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:15:48,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683794197] [2021-06-05 04:15:48,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:15:48,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:48,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:15:48,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:15:48,283 INFO L87 Difference]: Start difference. First operand 3708 states and 11792 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:48,752 INFO L93 Difference]: Finished difference Result 3819 states and 12002 transitions. [2021-06-05 04:15:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:15:48,752 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:15:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:48,756 INFO L225 Difference]: With dead ends: 3819 [2021-06-05 04:15:48,756 INFO L226 Difference]: Without dead ends: 3798 [2021-06-05 04:15:48,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:15:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-06-05 04:15:48,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 3706. [2021-06-05 04:15:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 3705 states have (on average 3.1813765182186233) internal successors, (11787), 3705 states have internal predecessors, (11787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 11787 transitions. [2021-06-05 04:15:48,797 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 11787 transitions. Word has length 20 [2021-06-05 04:15:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:48,797 INFO L482 AbstractCegarLoop]: Abstraction has 3706 states and 11787 transitions. [2021-06-05 04:15:48,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 11787 transitions. [2021-06-05 04:15:48,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:48,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:48,799 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:48,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34845 [2021-06-05 04:15:49,000 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:49,000 INFO L82 PathProgramCache]: Analyzing trace with hash 452803937, now seen corresponding path program 259 times [2021-06-05 04:15:49,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:49,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680694768] [2021-06-05 04:15:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:49,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:49,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680694768] [2021-06-05 04:15:49,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680694768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:49,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462684026] [2021-06-05 04:15:49,073 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:49,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:15:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:49,485 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 04:15:49,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:49,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:50,349 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 218 [2021-06-05 04:15:51,238 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 253 [2021-06-05 04:15:52,164 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 261 [2021-06-05 04:15:52,339 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 267 [2021-06-05 04:15:52,553 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 267 [2021-06-05 04:15:52,741 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 272 [2021-06-05 04:15:52,862 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 255 [2021-06-05 04:15:53,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:53,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:53,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:53,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:15:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:53,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462684026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:53,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:53,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:15:53,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357027483] [2021-06-05 04:15:53,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:15:53,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:53,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:15:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:15:53,104 INFO L87 Difference]: Start difference. First operand 3706 states and 11787 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 04:15:53,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:53,527 INFO L93 Difference]: Finished difference Result 3787 states and 11914 transitions. [2021-06-05 04:15:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:15:53,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 20 [2021-06-05 04:15:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:53,531 INFO L225 Difference]: With dead ends: 3787 [2021-06-05 04:15:53,531 INFO L226 Difference]: Without dead ends: 3758 [2021-06-05 04:15:53,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:15:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2021-06-05 04:15:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3704. [2021-06-05 04:15:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.179044018363489) internal successors, (11772), 3703 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11772 transitions. [2021-06-05 04:15:53,572 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11772 transitions. Word has length 20 [2021-06-05 04:15:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:53,572 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11772 transitions. [2021-06-05 04:15:53,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 04:15:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11772 transitions. [2021-06-05 04:15:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:53,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:53,574 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:53,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35236 [2021-06-05 04:15:53,775 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:53,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:53,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1936438747, now seen corresponding path program 260 times [2021-06-05 04:15:53,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:53,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763301639] [2021-06-05 04:15:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:53,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:53,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763301639] [2021-06-05 04:15:53,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763301639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:53,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205135962] [2021-06-05 04:15:53,860 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:53,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:15:53,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:53,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:15:53,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:54,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:54,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:54,798 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 244 [2021-06-05 04:15:54,931 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 354 [2021-06-05 04:15:55,534 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 403 [2021-06-05 04:15:56,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:56,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:56,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:56,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:15:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:56,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205135962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:56,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:56,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:15:56,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504196843] [2021-06-05 04:15:56,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:15:56,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:56,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:15:56,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:15:56,694 INFO L87 Difference]: Start difference. First operand 3704 states and 11772 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 04:15:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:57,104 INFO L93 Difference]: Finished difference Result 3820 states and 11980 transitions. [2021-06-05 04:15:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:15:57,104 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-06-05 04:15:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:57,108 INFO L225 Difference]: With dead ends: 3820 [2021-06-05 04:15:57,108 INFO L226 Difference]: Without dead ends: 3801 [2021-06-05 04:15:57,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:15:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-06-05 04:15:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3704. [2021-06-05 04:15:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.177153659195247) internal successors, (11765), 3703 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11765 transitions. [2021-06-05 04:15:57,148 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11765 transitions. Word has length 20 [2021-06-05 04:15:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:57,148 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11765 transitions. [2021-06-05 04:15:57,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 04:15:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11765 transitions. [2021-06-05 04:15:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:57,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:57,151 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:57,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35601 [2021-06-05 04:15:57,351 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:57,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:57,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1306449377, now seen corresponding path program 261 times [2021-06-05 04:15:57,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:57,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384132804] [2021-06-05 04:15:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:57,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:57,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384132804] [2021-06-05 04:15:57,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384132804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:57,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343812129] [2021-06-05 04:15:57,437 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:57,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:15:57,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:57,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:15:57,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:57,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:57,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:58,242 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 241 [2021-06-05 04:15:58,520 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 315 [2021-06-05 04:15:59,302 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 281 [2021-06-05 04:15:59,446 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 274 [2021-06-05 04:16:00,332 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 252 [2021-06-05 04:16:00,514 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 332 [2021-06-05 04:16:00,856 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 442 [2021-06-05 04:16:01,164 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 442 [2021-06-05 04:16:01,512 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 449 [2021-06-05 04:16:01,993 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 432 [2021-06-05 04:16:03,128 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 288 [2021-06-05 04:16:03,245 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 294 [2021-06-05 04:16:03,362 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 294 [2021-06-05 04:16:03,487 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 299 [2021-06-05 04:16:03,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:03,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:03,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:03,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:03,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343812129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:03,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:03,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:16:03,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861285739] [2021-06-05 04:16:03,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:16:03,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:03,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:16:03,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:03,619 INFO L87 Difference]: Start difference. First operand 3704 states and 11765 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 04:16:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:03,939 INFO L93 Difference]: Finished difference Result 3872 states and 12169 transitions. [2021-06-05 04:16:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:16:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-06-05 04:16:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:03,943 INFO L225 Difference]: With dead ends: 3872 [2021-06-05 04:16:03,943 INFO L226 Difference]: Without dead ends: 3867 [2021-06-05 04:16:03,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:16:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-06-05 04:16:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3704. [2021-06-05 04:16:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.177153659195247) internal successors, (11765), 3703 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11765 transitions. [2021-06-05 04:16:03,985 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11765 transitions. Word has length 20 [2021-06-05 04:16:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:03,985 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11765 transitions. [2021-06-05 04:16:03,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 04:16:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11765 transitions. [2021-06-05 04:16:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:03,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:03,987 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:04,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35895,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:04,188 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:04,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:04,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1269922247, now seen corresponding path program 262 times [2021-06-05 04:16:04,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:04,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622493246] [2021-06-05 04:16:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:04,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:04,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622493246] [2021-06-05 04:16:04,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622493246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:04,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191896971] [2021-06-05 04:16:04,279 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:04,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:04,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:04,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:16:04,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:04,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:04,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:06,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:06,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:06,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:06,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:06,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191896971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:06,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:06,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:16:06,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961844408] [2021-06-05 04:16:06,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:16:06,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:06,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:16:06,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:06,406 INFO L87 Difference]: Start difference. First operand 3704 states and 11765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:16:06,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:06,815 INFO L93 Difference]: Finished difference Result 3769 states and 11875 transitions. [2021-06-05 04:16:06,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:16:06,816 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 04:16:06,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:06,819 INFO L225 Difference]: With dead ends: 3769 [2021-06-05 04:16:06,820 INFO L226 Difference]: Without dead ends: 3760 [2021-06-05 04:16:06,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2021-06-05 04:16:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3700. [2021-06-05 04:16:06,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 3.176263855095972) internal successors, (11749), 3699 states have internal predecessors, (11749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 11749 transitions. [2021-06-05 04:16:06,860 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 11749 transitions. Word has length 20 [2021-06-05 04:16:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:06,860 INFO L482 AbstractCegarLoop]: Abstraction has 3700 states and 11749 transitions. [2021-06-05 04:16:06,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:16:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 11749 transitions. [2021-06-05 04:16:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:06,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:06,863 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:07,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36523 [2021-06-05 04:16:07,063 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash 142526154, now seen corresponding path program 263 times [2021-06-05 04:16:07,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:07,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613103435] [2021-06-05 04:16:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:07,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:07,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613103435] [2021-06-05 04:16:07,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613103435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:07,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334449018] [2021-06-05 04:16:07,104 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:07,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:16:07,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:07,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:07,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334449018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:07,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:07,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:16:07,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670999199] [2021-06-05 04:16:07,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:16:07,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:16:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:16:07,162 INFO L87 Difference]: Start difference. First operand 3700 states and 11749 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 04:16:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:07,224 INFO L93 Difference]: Finished difference Result 3959 states and 12236 transitions. [2021-06-05 04:16:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:16:07,224 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 20 [2021-06-05 04:16:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:07,228 INFO L225 Difference]: With dead ends: 3959 [2021-06-05 04:16:07,228 INFO L226 Difference]: Without dead ends: 3959 [2021-06-05 04:16:07,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:07,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-06-05 04:16:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3733. [2021-06-05 04:16:07,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.177652733118971) internal successors, (11859), 3732 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 11859 transitions. [2021-06-05 04:16:07,276 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 11859 transitions. Word has length 20 [2021-06-05 04:16:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:07,276 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 11859 transitions. [2021-06-05 04:16:07,276 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 04:16:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 11859 transitions. [2021-06-05 04:16:07,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:07,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:07,278 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:07,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36817,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:07,479 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:07,479 INFO L82 PathProgramCache]: Analyzing trace with hash 680381732, now seen corresponding path program 264 times [2021-06-05 04:16:07,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:07,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850887327] [2021-06-05 04:16:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:07,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:07,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850887327] [2021-06-05 04:16:07,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850887327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:07,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624153055] [2021-06-05 04:16:07,524 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:07,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:16:07,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:07,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:07,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:07,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624153055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:07,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:07,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:16:07,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768778882] [2021-06-05 04:16:07,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:07,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:07,583 INFO L87 Difference]: Start difference. First operand 3733 states and 11859 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:07,677 INFO L93 Difference]: Finished difference Result 4198 states and 12875 transitions. [2021-06-05 04:16:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:16:07,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:07,682 INFO L225 Difference]: With dead ends: 4198 [2021-06-05 04:16:07,682 INFO L226 Difference]: Without dead ends: 4198 [2021-06-05 04:16:07,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:16:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-06-05 04:16:07,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 3725. [2021-06-05 04:16:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.1766917293233083) internal successors, (11830), 3724 states have internal predecessors, (11830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 11830 transitions. [2021-06-05 04:16:07,728 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 11830 transitions. Word has length 20 [2021-06-05 04:16:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:07,728 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 11830 transitions. [2021-06-05 04:16:07,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 11830 transitions. [2021-06-05 04:16:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:07,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:07,731 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:07,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36818 [2021-06-05 04:16:07,931 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:07,932 INFO L82 PathProgramCache]: Analyzing trace with hash 174035466, now seen corresponding path program 265 times [2021-06-05 04:16:07,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:07,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666068907] [2021-06-05 04:16:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:07,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:07,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666068907] [2021-06-05 04:16:07,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666068907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:07,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730103643] [2021-06-05 04:16:07,978 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:08,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:08,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:08,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730103643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:08,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:08,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:16:08,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002209556] [2021-06-05 04:16:08,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:08,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:08,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:08,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:08,033 INFO L87 Difference]: Start difference. First operand 3725 states and 11830 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:08,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:08,161 INFO L93 Difference]: Finished difference Result 4548 states and 13998 transitions. [2021-06-05 04:16:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:16:08,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:08,166 INFO L225 Difference]: With dead ends: 4548 [2021-06-05 04:16:08,166 INFO L226 Difference]: Without dead ends: 4548 [2021-06-05 04:16:08,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:16:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-06-05 04:16:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 3857. [2021-06-05 04:16:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 3.171421161825726) internal successors, (12229), 3856 states have internal predecessors, (12229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 12229 transitions. [2021-06-05 04:16:08,214 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 12229 transitions. Word has length 20 [2021-06-05 04:16:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:08,214 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 12229 transitions. [2021-06-05 04:16:08,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 12229 transitions. [2021-06-05 04:16:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:08,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:08,217 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:08,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36819,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:08,417 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1657170404, now seen corresponding path program 266 times [2021-06-05 04:16:08,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:08,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45361930] [2021-06-05 04:16:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:08,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:08,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45361930] [2021-06-05 04:16:08,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45361930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:08,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605221166] [2021-06-05 04:16:08,467 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:08,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:08,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:08,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:08,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605221166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:08,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:08,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:16:08,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741530278] [2021-06-05 04:16:08,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:08,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:08,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:08,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:08,522 INFO L87 Difference]: Start difference. First operand 3857 states and 12229 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:08,700 INFO L93 Difference]: Finished difference Result 5083 states and 15588 transitions. [2021-06-05 04:16:08,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:16:08,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:08,705 INFO L225 Difference]: With dead ends: 5083 [2021-06-05 04:16:08,705 INFO L226 Difference]: Without dead ends: 5083 [2021-06-05 04:16:08,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:16:08,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-06-05 04:16:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 3996. [2021-06-05 04:16:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 3.17171464330413) internal successors, (12671), 3995 states have internal predecessors, (12671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 12671 transitions. [2021-06-05 04:16:08,756 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 12671 transitions. Word has length 20 [2021-06-05 04:16:08,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:08,757 INFO L482 AbstractCegarLoop]: Abstraction has 3996 states and 12671 transitions. [2021-06-05 04:16:08,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 12671 transitions. [2021-06-05 04:16:08,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:08,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:08,760 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:08,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36820 [2021-06-05 04:16:08,960 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash -319341737, now seen corresponding path program 267 times [2021-06-05 04:16:08,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:08,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049539885] [2021-06-05 04:16:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:09,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:09,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049539885] [2021-06-05 04:16:09,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049539885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:09,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213855862] [2021-06-05 04:16:09,039 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:09,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:16:09,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:09,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:16:09,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:09,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:09,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:10,123 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 279 [2021-06-05 04:16:10,236 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 351 [2021-06-05 04:16:10,364 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 305 [2021-06-05 04:16:10,994 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 261 [2021-06-05 04:16:11,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:11,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:11,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:11,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:11,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213855862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:11,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:11,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 04:16:11,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690809186] [2021-06-05 04:16:11,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:16:11,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:11,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:16:11,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:16:11,701 INFO L87 Difference]: Start difference. First operand 3996 states and 12671 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 04:16:12,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:12,100 INFO L93 Difference]: Finished difference Result 4050 states and 12777 transitions. [2021-06-05 04:16:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:16:12,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 20 [2021-06-05 04:16:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:12,104 INFO L225 Difference]: With dead ends: 4050 [2021-06-05 04:16:12,104 INFO L226 Difference]: Without dead ends: 4040 [2021-06-05 04:16:12,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2021-06-05 04:16:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 3997. [2021-06-05 04:16:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3997 states, 3996 states have (on average 3.171921921921922) internal successors, (12675), 3996 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 12675 transitions. [2021-06-05 04:16:12,148 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 12675 transitions. Word has length 20 [2021-06-05 04:16:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:12,149 INFO L482 AbstractCegarLoop]: Abstraction has 3997 states and 12675 transitions. [2021-06-05 04:16:12,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 04:16:12,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 12675 transitions. [2021-06-05 04:16:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:12,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:12,151 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:12,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36821 [2021-06-05 04:16:12,351 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1918399472, now seen corresponding path program 268 times [2021-06-05 04:16:12,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:12,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514439166] [2021-06-05 04:16:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:12,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:12,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514439166] [2021-06-05 04:16:12,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514439166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709329794] [2021-06-05 04:16:12,399 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:12,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:12,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:12,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:12,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:12,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709329794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:12,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:16:12,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068613218] [2021-06-05 04:16:12,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:12,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:12,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:12,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:12,454 INFO L87 Difference]: Start difference. First operand 3997 states and 12675 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:12,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:12,576 INFO L93 Difference]: Finished difference Result 4890 states and 15000 transitions. [2021-06-05 04:16:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:16:12,577 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:12,581 INFO L225 Difference]: With dead ends: 4890 [2021-06-05 04:16:12,581 INFO L226 Difference]: Without dead ends: 4890 [2021-06-05 04:16:12,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:16:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4890 states. [2021-06-05 04:16:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4890 to 2217. [2021-06-05 04:16:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.1164259927797833) internal successors, (6906), 2216 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6906 transitions. [2021-06-05 04:16:12,614 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6906 transitions. Word has length 20 [2021-06-05 04:16:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:12,614 INFO L482 AbstractCegarLoop]: Abstraction has 2217 states and 6906 transitions. [2021-06-05 04:16:12,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:12,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6906 transitions. [2021-06-05 04:16:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:12,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:12,616 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:12,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37026,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:12,816 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:12,817 INFO L82 PathProgramCache]: Analyzing trace with hash -893432886, now seen corresponding path program 269 times [2021-06-05 04:16:12,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:12,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499974910] [2021-06-05 04:16:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:12,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:12,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499974910] [2021-06-05 04:16:12,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499974910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138289928] [2021-06-05 04:16:12,867 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:12,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:16:12,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:12,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:12,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:12,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138289928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:12,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:16:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81388148] [2021-06-05 04:16:12,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:12,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:12,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:12,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:12,927 INFO L87 Difference]: Start difference. First operand 2217 states and 6906 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:13,106 INFO L93 Difference]: Finished difference Result 3552 states and 10616 transitions. [2021-06-05 04:16:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:16:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:13,109 INFO L225 Difference]: With dead ends: 3552 [2021-06-05 04:16:13,109 INFO L226 Difference]: Without dead ends: 3552 [2021-06-05 04:16:13,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:16:13,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2021-06-05 04:16:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 2210. [2021-06-05 04:16:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 3.122227252150294) internal successors, (6897), 2209 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 04:16:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 6897 transitions. [2021-06-05 04:16:13,137 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 6897 transitions. Word has length 20 [2021-06-05 04:16:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:13,138 INFO L482 AbstractCegarLoop]: Abstraction has 2210 states and 6897 transitions. [2021-06-05 04:16:13,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 6897 transitions. [2021-06-05 04:16:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:13,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:13,139 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:13,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37027 [2021-06-05 04:16:13,340 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:13,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1917147897, now seen corresponding path program 270 times [2021-06-05 04:16:13,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:13,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807870377] [2021-06-05 04:16:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:13,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:13,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807870377] [2021-06-05 04:16:13,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807870377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:13,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526929894] [2021-06-05 04:16:13,432 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:13,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:16:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:13,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:16:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:13,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:13,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:14,419 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 240 [2021-06-05 04:16:14,712 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 287 [2021-06-05 04:16:15,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:15,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:15,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:15,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:15,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526929894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:15,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:15,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:16:15,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180219171] [2021-06-05 04:16:15,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:16:15,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:16:15,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:15,427 INFO L87 Difference]: Start difference. First operand 2210 states and 6897 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:16:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:15,691 INFO L93 Difference]: Finished difference Result 2235 states and 6947 transitions. [2021-06-05 04:16:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:16:15,692 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 04:16:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:15,694 INFO L225 Difference]: With dead ends: 2235 [2021-06-05 04:16:15,694 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 04:16:15,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 04:16:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2208. [2021-06-05 04:16:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.122791119166289) internal successors, (6892), 2207 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6892 transitions. [2021-06-05 04:16:15,716 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6892 transitions. Word has length 20 [2021-06-05 04:16:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:15,716 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6892 transitions. [2021-06-05 04:16:15,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:16:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6892 transitions. [2021-06-05 04:16:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:15,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:15,718 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:15,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37028,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:15,919 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:15,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1281932618, now seen corresponding path program 271 times [2021-06-05 04:16:15,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:15,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694738219] [2021-06-05 04:16:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:15,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:15,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694738219] [2021-06-05 04:16:15,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694738219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:15,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821903753] [2021-06-05 04:16:15,968 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:15,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:16,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821903753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:16,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:16,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:16,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134795088] [2021-06-05 04:16:16,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:16,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:16,028 INFO L87 Difference]: Start difference. First operand 2208 states and 6892 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:16,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:16,139 INFO L93 Difference]: Finished difference Result 2603 states and 7643 transitions. [2021-06-05 04:16:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:16:16,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:16,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:16,142 INFO L225 Difference]: With dead ends: 2603 [2021-06-05 04:16:16,142 INFO L226 Difference]: Without dead ends: 2603 [2021-06-05 04:16:16,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:16:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-05 04:16:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1561. [2021-06-05 04:16:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.0724358974358976) internal successors, (4793), 1560 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4793 transitions. [2021-06-05 04:16:16,162 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4793 transitions. Word has length 20 [2021-06-05 04:16:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:16,162 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4793 transitions. [2021-06-05 04:16:16,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:16,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4793 transitions. [2021-06-05 04:16:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:16,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:16,164 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:16,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37319,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:16,364 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1529899740, now seen corresponding path program 272 times [2021-06-05 04:16:16,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:16,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120031554] [2021-06-05 04:16:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:16,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:16,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120031554] [2021-06-05 04:16:16,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120031554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:16,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164051332] [2021-06-05 04:16:16,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:16,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:16,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:16,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:16,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:16,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164051332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:16,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:16,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:16,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486970386] [2021-06-05 04:16:16,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:16,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:16,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:16,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:16,477 INFO L87 Difference]: Start difference. First operand 1561 states and 4793 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:16,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:16,651 INFO L93 Difference]: Finished difference Result 2319 states and 6788 transitions. [2021-06-05 04:16:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:16:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:16,653 INFO L225 Difference]: With dead ends: 2319 [2021-06-05 04:16:16,653 INFO L226 Difference]: Without dead ends: 2319 [2021-06-05 04:16:16,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-05 04:16:16,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1568. [2021-06-05 04:16:16,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.0855137204850034) internal successors, (4835), 1567 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 4835 transitions. [2021-06-05 04:16:16,672 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 4835 transitions. Word has length 20 [2021-06-05 04:16:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:16,672 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 4835 transitions. [2021-06-05 04:16:16,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 4835 transitions. [2021-06-05 04:16:16,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:16,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:16,673 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:16,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37320,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:16,874 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:16,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1497610378, now seen corresponding path program 273 times [2021-06-05 04:16:16,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:16,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882805193] [2021-06-05 04:16:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:16,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:16,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882805193] [2021-06-05 04:16:16,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882805193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:16,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209925296] [2021-06-05 04:16:16,951 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:16,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:16:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:17,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209925296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:17,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:17,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:17,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656286805] [2021-06-05 04:16:17,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:17,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:17,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:17,016 INFO L87 Difference]: Start difference. First operand 1568 states and 4835 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:17,236 INFO L93 Difference]: Finished difference Result 2424 states and 7063 transitions. [2021-06-05 04:16:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:17,239 INFO L225 Difference]: With dead ends: 2424 [2021-06-05 04:16:17,239 INFO L226 Difference]: Without dead ends: 2424 [2021-06-05 04:16:17,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:16:17,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-06-05 04:16:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1795. [2021-06-05 04:16:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.092530657748049) internal successors, (5548), 1794 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:17,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 5548 transitions. [2021-06-05 04:16:17,260 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 5548 transitions. Word has length 20 [2021-06-05 04:16:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:17,260 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 5548 transitions. [2021-06-05 04:16:17,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 5548 transitions. [2021-06-05 04:16:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:17,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:17,262 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:17,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37321,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:17,462 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:17,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2078632399, now seen corresponding path program 274 times [2021-06-05 04:16:17,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:17,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755142443] [2021-06-05 04:16:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:17,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:17,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755142443] [2021-06-05 04:16:17,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755142443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:17,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148424068] [2021-06-05 04:16:17,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:17,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:17,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:17,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:16:17,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:17,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:17,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:18,344 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 225 [2021-06-05 04:16:18,930 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 266 [2021-06-05 04:16:19,057 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 303 [2021-06-05 04:16:19,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:19,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:19,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:19,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:19,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148424068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:19,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:19,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:16:19,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803769127] [2021-06-05 04:16:19,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:16:19,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:16:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:19,758 INFO L87 Difference]: Start difference. First operand 1795 states and 5548 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:16:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:20,127 INFO L93 Difference]: Finished difference Result 1927 states and 5783 transitions. [2021-06-05 04:16:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:16:20,127 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 04:16:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:20,129 INFO L225 Difference]: With dead ends: 1927 [2021-06-05 04:16:20,129 INFO L226 Difference]: Without dead ends: 1917 [2021-06-05 04:16:20,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-06-05 04:16:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1800. [2021-06-05 04:16:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.093941078376876) internal successors, (5566), 1799 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 5566 transitions. [2021-06-05 04:16:20,146 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 5566 transitions. Word has length 20 [2021-06-05 04:16:20,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:20,147 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 5566 transitions. [2021-06-05 04:16:20,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:16:20,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 5566 transitions. [2021-06-05 04:16:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:20,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:20,148 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:20,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37322,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:20,349 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1005776894, now seen corresponding path program 275 times [2021-06-05 04:16:20,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:20,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429982603] [2021-06-05 04:16:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:20,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:20,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429982603] [2021-06-05 04:16:20,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429982603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:20,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048538701] [2021-06-05 04:16:20,398 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:20,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:16:20,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:20,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:20,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:20,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048538701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:20,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:20,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:20,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979423082] [2021-06-05 04:16:20,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:20,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:20,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:20,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:20,461 INFO L87 Difference]: Start difference. First operand 1800 states and 5566 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:20,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:20,621 INFO L93 Difference]: Finished difference Result 2241 states and 6581 transitions. [2021-06-05 04:16:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:16:20,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:20,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:20,624 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 04:16:20,624 INFO L226 Difference]: Without dead ends: 2241 [2021-06-05 04:16:20,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-06-05 04:16:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1485. [2021-06-05 04:16:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.0808625336927222) internal successors, (4572), 1484 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:20,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 4572 transitions. [2021-06-05 04:16:20,640 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 4572 transitions. Word has length 20 [2021-06-05 04:16:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:20,640 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 4572 transitions. [2021-06-05 04:16:20,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 4572 transitions. [2021-06-05 04:16:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:20,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:20,641 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:20,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37547 [2021-06-05 04:16:20,842 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:20,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:20,842 INFO L82 PathProgramCache]: Analyzing trace with hash -261680284, now seen corresponding path program 276 times [2021-06-05 04:16:20,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:20,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244897861] [2021-06-05 04:16:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:20,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:20,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244897861] [2021-06-05 04:16:20,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244897861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:20,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996643664] [2021-06-05 04:16:20,894 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:20,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:16:20,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:20,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:20,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:20,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996643664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:20,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:20,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:20,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593643711] [2021-06-05 04:16:20,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:20,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:20,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:20,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:20,963 INFO L87 Difference]: Start difference. First operand 1485 states and 4572 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:21,185 INFO L93 Difference]: Finished difference Result 2226 states and 6445 transitions. [2021-06-05 04:16:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:16:21,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:21,187 INFO L225 Difference]: With dead ends: 2226 [2021-06-05 04:16:21,187 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 04:16:21,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:16:21,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 04:16:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1519. [2021-06-05 04:16:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.0843214756258233) internal successors, (4682), 1518 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:21,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4682 transitions. [2021-06-05 04:16:21,204 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4682 transitions. Word has length 20 [2021-06-05 04:16:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:21,204 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4682 transitions. [2021-06-05 04:16:21,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4682 transitions. [2021-06-05 04:16:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:21,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:21,205 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:21,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37548 [2021-06-05 04:16:21,406 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:21,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1932074553, now seen corresponding path program 277 times [2021-06-05 04:16:21,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:21,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918302360] [2021-06-05 04:16:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:21,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:21,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918302360] [2021-06-05 04:16:21,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918302360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:21,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48024558] [2021-06-05 04:16:21,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:21,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:16:21,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:21,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:21,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:22,653 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 293 [2021-06-05 04:16:22,795 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 362 [2021-06-05 04:16:23,741 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 330 [2021-06-05 04:16:23,886 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 330 [2021-06-05 04:16:24,108 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 334 [2021-06-05 04:16:24,377 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 369 [2021-06-05 04:16:24,617 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 224 [2021-06-05 04:16:25,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:25,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:25,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:25,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:25,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48024558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:25,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:25,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:16:25,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865483288] [2021-06-05 04:16:25,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:16:25,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:25,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:16:25,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:25,416 INFO L87 Difference]: Start difference. First operand 1519 states and 4682 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:16:25,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:25,681 INFO L93 Difference]: Finished difference Result 1555 states and 4757 transitions. [2021-06-05 04:16:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:16:25,681 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 04:16:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:25,683 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 04:16:25,683 INFO L226 Difference]: Without dead ends: 1550 [2021-06-05 04:16:25,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:16:25,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-06-05 04:16:25,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1520. [2021-06-05 04:16:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.0849242922975644) internal successors, (4686), 1519 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 4686 transitions. [2021-06-05 04:16:25,698 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 4686 transitions. Word has length 20 [2021-06-05 04:16:25,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:25,698 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 4686 transitions. [2021-06-05 04:16:25,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:16:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 4686 transitions. [2021-06-05 04:16:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:25,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:25,699 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:25,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37549 [2021-06-05 04:16:25,900 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:25,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:25,900 INFO L82 PathProgramCache]: Analyzing trace with hash -998610844, now seen corresponding path program 278 times [2021-06-05 04:16:25,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:25,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513414376] [2021-06-05 04:16:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:25,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:25,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513414376] [2021-06-05 04:16:25,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513414376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:25,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317608922] [2021-06-05 04:16:25,938 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:25,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:25,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:25,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:25,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:16:26,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317608922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:26,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:26,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:16:26,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455637242] [2021-06-05 04:16:26,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:16:26,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:26,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:16:26,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:16:26,001 INFO L87 Difference]: Start difference. First operand 1520 states and 4686 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:26,074 INFO L93 Difference]: Finished difference Result 1775 states and 5123 transitions. [2021-06-05 04:16:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:16:26,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:26,076 INFO L225 Difference]: With dead ends: 1775 [2021-06-05 04:16:26,076 INFO L226 Difference]: Without dead ends: 1775 [2021-06-05 04:16:26,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-05 04:16:26,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1531. [2021-06-05 04:16:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.08562091503268) internal successors, (4721), 1530 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4721 transitions. [2021-06-05 04:16:26,092 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4721 transitions. Word has length 20 [2021-06-05 04:16:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:26,092 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4721 transitions. [2021-06-05 04:16:26,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4721 transitions. [2021-06-05 04:16:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:26,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:26,094 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:26,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37970,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:26,294 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:26,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1235496650, now seen corresponding path program 279 times [2021-06-05 04:16:26,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:26,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443279402] [2021-06-05 04:16:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:26,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:26,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443279402] [2021-06-05 04:16:26,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443279402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:26,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717750403] [2021-06-05 04:16:26,336 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:26,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:16:26,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:26,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:26,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:26,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717750403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:26,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:26,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:16:26,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402541008] [2021-06-05 04:16:26,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:16:26,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:26,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:16:26,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:16:26,396 INFO L87 Difference]: Start difference. First operand 1531 states and 4721 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 04:16:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:26,485 INFO L93 Difference]: Finished difference Result 1802 states and 5179 transitions. [2021-06-05 04:16:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:16:26,485 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 20 [2021-06-05 04:16:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:26,487 INFO L225 Difference]: With dead ends: 1802 [2021-06-05 04:16:26,487 INFO L226 Difference]: Without dead ends: 1802 [2021-06-05 04:16:26,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:16:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-06-05 04:16:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1476. [2021-06-05 04:16:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.079322033898305) internal successors, (4542), 1475 states have internal predecessors, (4542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4542 transitions. [2021-06-05 04:16:26,501 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4542 transitions. Word has length 20 [2021-06-05 04:16:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:26,502 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4542 transitions. [2021-06-05 04:16:26,502 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 04:16:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4542 transitions. [2021-06-05 04:16:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:26,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:26,503 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:26,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37971,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:26,703 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:26,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:26,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1773352228, now seen corresponding path program 280 times [2021-06-05 04:16:26,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:26,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926144490] [2021-06-05 04:16:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:26,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:26,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926144490] [2021-06-05 04:16:26,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926144490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:26,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198267783] [2021-06-05 04:16:26,746 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:26,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:26,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:26,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:26,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:26,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198267783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:26,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:26,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:16:26,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048563371] [2021-06-05 04:16:26,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:26,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:26,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:26,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:26,808 INFO L87 Difference]: Start difference. First operand 1476 states and 4542 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:26,902 INFO L93 Difference]: Finished difference Result 1732 states and 4957 transitions. [2021-06-05 04:16:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:16:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:26,904 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 04:16:26,904 INFO L226 Difference]: Without dead ends: 1732 [2021-06-05 04:16:26,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-06-05 04:16:26,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1312. [2021-06-05 04:16:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.0671243325705566) internal successors, (4021), 1311 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 04:16:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 4021 transitions. [2021-06-05 04:16:26,918 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 4021 transitions. Word has length 20 [2021-06-05 04:16:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:26,918 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 4021 transitions. [2021-06-05 04:16:26,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 4021 transitions. [2021-06-05 04:16:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:26,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:26,919 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:27,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37972,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:27,120 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:27,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1544826396, now seen corresponding path program 281 times [2021-06-05 04:16:27,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:27,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401476719] [2021-06-05 04:16:27,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:27,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:27,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401476719] [2021-06-05 04:16:27,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401476719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:27,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144522810] [2021-06-05 04:16:27,171 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:27,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:16:27,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:27,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:27,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:27,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144522810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:27,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:27,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:27,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386962703] [2021-06-05 04:16:27,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:27,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:27,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:27,234 INFO L87 Difference]: Start difference. First operand 1312 states and 4021 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:27,357 INFO L93 Difference]: Finished difference Result 1787 states and 5216 transitions. [2021-06-05 04:16:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:16:27,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:27,359 INFO L225 Difference]: With dead ends: 1787 [2021-06-05 04:16:27,359 INFO L226 Difference]: Without dead ends: 1787 [2021-06-05 04:16:27,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:16:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-06-05 04:16:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1538. [2021-06-05 04:16:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.0709173715029277) internal successors, (4720), 1537 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4720 transitions. [2021-06-05 04:16:27,375 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4720 transitions. Word has length 20 [2021-06-05 04:16:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:27,375 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4720 transitions. [2021-06-05 04:16:27,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4720 transitions. [2021-06-05 04:16:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:27,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:27,376 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:27,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37973 [2021-06-05 04:16:27,577 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:27,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1482683722, now seen corresponding path program 282 times [2021-06-05 04:16:27,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:27,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492670089] [2021-06-05 04:16:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:27,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492670089] [2021-06-05 04:16:27,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492670089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515474309] [2021-06-05 04:16:27,629 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:27,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:16:27,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:27,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:27,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515474309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:27,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:27,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:27,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526593877] [2021-06-05 04:16:27,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:27,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:27,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:27,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:27,700 INFO L87 Difference]: Start difference. First operand 1538 states and 4720 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:27,904 INFO L93 Difference]: Finished difference Result 1812 states and 5269 transitions. [2021-06-05 04:16:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:16:27,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:27,906 INFO L225 Difference]: With dead ends: 1812 [2021-06-05 04:16:27,906 INFO L226 Difference]: Without dead ends: 1812 [2021-06-05 04:16:27,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:16:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-06-05 04:16:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1587. [2021-06-05 04:16:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.0687263556116013) internal successors, (4867), 1586 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4867 transitions. [2021-06-05 04:16:27,940 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4867 transitions. Word has length 20 [2021-06-05 04:16:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:27,940 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 4867 transitions. [2021-06-05 04:16:27,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:27,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4867 transitions. [2021-06-05 04:16:27,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:27,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:27,942 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:28,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37974 [2021-06-05 04:16:28,142 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:28,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:28,144 INFO L82 PathProgramCache]: Analyzing trace with hash 846216868, now seen corresponding path program 283 times [2021-06-05 04:16:28,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:28,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176308268] [2021-06-05 04:16:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:28,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:28,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176308268] [2021-06-05 04:16:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176308268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:28,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714876172] [2021-06-05 04:16:28,199 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:28,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:28,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:28,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714876172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:28,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:28,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:28,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827294030] [2021-06-05 04:16:28,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:28,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:28,260 INFO L87 Difference]: Start difference. First operand 1587 states and 4867 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:28,478 INFO L93 Difference]: Finished difference Result 1938 states and 5602 transitions. [2021-06-05 04:16:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:16:28,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:28,480 INFO L225 Difference]: With dead ends: 1938 [2021-06-05 04:16:28,480 INFO L226 Difference]: Without dead ends: 1938 [2021-06-05 04:16:28,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:16:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-06-05 04:16:28,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1604. [2021-06-05 04:16:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.0679975046787273) internal successors, (4918), 1603 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 4918 transitions. [2021-06-05 04:16:28,496 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 4918 transitions. Word has length 20 [2021-06-05 04:16:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:28,497 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 4918 transitions. [2021-06-05 04:16:28,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 4918 transitions. [2021-06-05 04:16:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:28,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:28,498 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:28,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37975 [2021-06-05 04:16:28,699 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:28,699 INFO L82 PathProgramCache]: Analyzing trace with hash -782068073, now seen corresponding path program 284 times [2021-06-05 04:16:28,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:28,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166019703] [2021-06-05 04:16:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:28,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:28,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166019703] [2021-06-05 04:16:28,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166019703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:28,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477507079] [2021-06-05 04:16:28,797 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:28,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:28,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:28,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:16:28,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:29,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:29,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:29,787 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 325 [2021-06-05 04:16:29,910 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 325 [2021-06-05 04:16:30,057 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 336 [2021-06-05 04:16:30,183 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 288 [2021-06-05 04:16:30,328 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 327 [2021-06-05 04:16:30,453 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 297 [2021-06-05 04:16:31,132 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 240 [2021-06-05 04:16:31,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:31,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:31,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:31,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:31,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477507079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:31,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:31,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:16:31,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881360026] [2021-06-05 04:16:31,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:16:31,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:31,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:16:31,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:16:31,806 INFO L87 Difference]: Start difference. First operand 1604 states and 4918 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:16:32,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:32,341 INFO L93 Difference]: Finished difference Result 1808 states and 5373 transitions. [2021-06-05 04:16:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:16:32,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 20 [2021-06-05 04:16:32,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:32,343 INFO L225 Difference]: With dead ends: 1808 [2021-06-05 04:16:32,343 INFO L226 Difference]: Without dead ends: 1798 [2021-06-05 04:16:32,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:16:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-06-05 04:16:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1653. [2021-06-05 04:16:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.087772397094431) internal successors, (5101), 1652 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5101 transitions. [2021-06-05 04:16:32,360 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5101 transitions. Word has length 20 [2021-06-05 04:16:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:32,360 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5101 transitions. [2021-06-05 04:16:32,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:16:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5101 transitions. [2021-06-05 04:16:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:32,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:32,361 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:32,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37976 [2021-06-05 04:16:32,562 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:32,562 INFO L82 PathProgramCache]: Analyzing trace with hash -395866959, now seen corresponding path program 285 times [2021-06-05 04:16:32,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:32,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877170201] [2021-06-05 04:16:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:32,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:32,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877170201] [2021-06-05 04:16:32,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877170201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:32,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977938798] [2021-06-05 04:16:32,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:32,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:16:32,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:32,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:16:32,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:33,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:33,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:33,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:33,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:33,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:33,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:33,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977938798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:33,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:33,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 04:16:33,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272441154] [2021-06-05 04:16:33,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:16:33,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:33,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:16:33,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:16:33,908 INFO L87 Difference]: Start difference. First operand 1653 states and 5101 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 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 04:16:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:34,421 INFO L93 Difference]: Finished difference Result 1770 states and 5320 transitions. [2021-06-05 04:16:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:16:34,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 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 20 [2021-06-05 04:16:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:34,423 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 04:16:34,423 INFO L226 Difference]: Without dead ends: 1765 [2021-06-05 04:16:34,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 393.1ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:16:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-05 04:16:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1653. [2021-06-05 04:16:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.087772397094431) internal successors, (5101), 1652 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:34,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5101 transitions. [2021-06-05 04:16:34,439 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5101 transitions. Word has length 20 [2021-06-05 04:16:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:34,439 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5101 transitions. [2021-06-05 04:16:34,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 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 04:16:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5101 transitions. [2021-06-05 04:16:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:34,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:34,440 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:34,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38314 [2021-06-05 04:16:34,641 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:34,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1057130742, now seen corresponding path program 286 times [2021-06-05 04:16:34,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:34,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108744249] [2021-06-05 04:16:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:34,703 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 04:16:34,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:34,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108744249] [2021-06-05 04:16:34,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108744249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:34,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212838416] [2021-06-05 04:16:34,703 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:34,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:34,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:34,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:34,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:34,760 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 04:16:34,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212838416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:34,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:34,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:16:34,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029262361] [2021-06-05 04:16:34,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:16:34,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:34,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:16:34,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:16:34,761 INFO L87 Difference]: Start difference. First operand 1653 states and 5101 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 04:16:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:34,835 INFO L93 Difference]: Finished difference Result 1988 states and 5715 transitions. [2021-06-05 04:16:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:16:34,835 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 20 [2021-06-05 04:16:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:34,837 INFO L225 Difference]: With dead ends: 1988 [2021-06-05 04:16:34,837 INFO L226 Difference]: Without dead ends: 1988 [2021-06-05 04:16:34,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-06-05 04:16:34,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1661. [2021-06-05 04:16:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.0897590361445784) internal successors, (5129), 1660 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5129 transitions. [2021-06-05 04:16:34,855 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5129 transitions. Word has length 20 [2021-06-05 04:16:34,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:34,855 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5129 transitions. [2021-06-05 04:16:34,855 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 04:16:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5129 transitions. [2021-06-05 04:16:34,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:34,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:34,856 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:35,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38486,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:35,057 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash 757652935, now seen corresponding path program 287 times [2021-06-05 04:16:35,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:35,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496919294] [2021-06-05 04:16:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:35,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:35,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496919294] [2021-06-05 04:16:35,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496919294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:35,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626447362] [2021-06-05 04:16:35,142 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:35,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:16:35,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:35,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:16:35,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:35,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:35,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:36,243 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 259 [2021-06-05 04:16:36,658 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 255 [2021-06-05 04:16:36,788 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 214 [2021-06-05 04:16:37,184 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 336 [2021-06-05 04:16:37,435 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 375 [2021-06-05 04:16:37,704 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 375 [2021-06-05 04:16:37,976 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 380 [2021-06-05 04:16:38,251 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 478 [2021-06-05 04:16:38,426 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 322 [2021-06-05 04:16:38,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:38,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:38,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:38,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:38,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626447362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:38,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:38,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:16:38,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810459983] [2021-06-05 04:16:38,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:16:38,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:38,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:16:38,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:38,986 INFO L87 Difference]: Start difference. First operand 1661 states and 5129 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 04:16:39,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:39,354 INFO L93 Difference]: Finished difference Result 1764 states and 5293 transitions. [2021-06-05 04:16:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:16:39,354 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-06-05 04:16:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:39,356 INFO L225 Difference]: With dead ends: 1764 [2021-06-05 04:16:39,356 INFO L226 Difference]: Without dead ends: 1737 [2021-06-05 04:16:39,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:16:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-06-05 04:16:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1661. [2021-06-05 04:16:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.075903614457831) internal successors, (5106), 1660 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5106 transitions. [2021-06-05 04:16:39,373 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5106 transitions. Word has length 20 [2021-06-05 04:16:39,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:39,373 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5106 transitions. [2021-06-05 04:16:39,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 04:16:39,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5106 transitions. [2021-06-05 04:16:39,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:39,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:39,375 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:39,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38487,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:39,575 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:39,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1034884042, now seen corresponding path program 288 times [2021-06-05 04:16:39,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:39,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647621774] [2021-06-05 04:16:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:39,635 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 04:16:39,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:39,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647621774] [2021-06-05 04:16:39,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647621774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:39,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233988322] [2021-06-05 04:16:39,635 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:39,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:16:39,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:39,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:39,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233988322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:39,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:39,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:39,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261481720] [2021-06-05 04:16:39,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:39,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:39,700 INFO L87 Difference]: Start difference. First operand 1661 states and 5106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:39,913 INFO L93 Difference]: Finished difference Result 2203 states and 6445 transitions. [2021-06-05 04:16:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:16:39,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:39,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:39,915 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 04:16:39,915 INFO L226 Difference]: Without dead ends: 2203 [2021-06-05 04:16:39,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:16:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-05 04:16:39,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1708. [2021-06-05 04:16:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.074985354422964) internal successors, (5249), 1707 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5249 transitions. [2021-06-05 04:16:39,933 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5249 transitions. Word has length 20 [2021-06-05 04:16:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:39,933 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5249 transitions. [2021-06-05 04:16:39,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5249 transitions. [2021-06-05 04:16:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:39,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:39,935 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:40,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38706 [2021-06-05 04:16:40,135 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:40,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1515719248, now seen corresponding path program 289 times [2021-06-05 04:16:40,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:40,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115117750] [2021-06-05 04:16:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:40,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:40,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115117750] [2021-06-05 04:16:40,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115117750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:40,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915576240] [2021-06-05 04:16:40,190 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:40,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:40,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:40,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915576240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:40,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:40,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:40,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270332400] [2021-06-05 04:16:40,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:40,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:40,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:40,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:40,253 INFO L87 Difference]: Start difference. First operand 1708 states and 5249 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:40,434 INFO L93 Difference]: Finished difference Result 1957 states and 5754 transitions. [2021-06-05 04:16:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:16:40,434 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:40,436 INFO L225 Difference]: With dead ends: 1957 [2021-06-05 04:16:40,436 INFO L226 Difference]: Without dead ends: 1957 [2021-06-05 04:16:40,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-06-05 04:16:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1714. [2021-06-05 04:16:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.0758902510215997) internal successors, (5269), 1713 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5269 transitions. [2021-06-05 04:16:40,453 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5269 transitions. Word has length 20 [2021-06-05 04:16:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:40,453 INFO L482 AbstractCegarLoop]: Abstraction has 1714 states and 5269 transitions. [2021-06-05 04:16:40,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5269 transitions. [2021-06-05 04:16:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:40,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:40,455 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:40,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38707,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:40,656 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:40,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2142781194, now seen corresponding path program 290 times [2021-06-05 04:16:40,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:40,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792723102] [2021-06-05 04:16:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:40,713 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 04:16:40,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:40,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792723102] [2021-06-05 04:16:40,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792723102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:40,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755408449] [2021-06-05 04:16:40,714 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:40,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:40,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:40,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:40,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:40,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755408449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:40,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:40,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:40,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880694862] [2021-06-05 04:16:40,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:40,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:40,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:40,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:40,775 INFO L87 Difference]: Start difference. First operand 1714 states and 5269 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:40,990 INFO L93 Difference]: Finished difference Result 2009 states and 5887 transitions. [2021-06-05 04:16:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:16:40,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:40,992 INFO L225 Difference]: With dead ends: 2009 [2021-06-05 04:16:40,992 INFO L226 Difference]: Without dead ends: 2009 [2021-06-05 04:16:40,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:16:40,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-06-05 04:16:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1728. [2021-06-05 04:16:41,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 3.0752750434279097) internal successors, (5311), 1727 states have internal predecessors, (5311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 5311 transitions. [2021-06-05 04:16:41,010 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 5311 transitions. Word has length 20 [2021-06-05 04:16:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:41,010 INFO L482 AbstractCegarLoop]: Abstraction has 1728 states and 5311 transitions. [2021-06-05 04:16:41,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:41,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 5311 transitions. [2021-06-05 04:16:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:41,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:41,011 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:41,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38708,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:41,212 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:41,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1900166407, now seen corresponding path program 291 times [2021-06-05 04:16:41,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:41,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129266332] [2021-06-05 04:16:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:41,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:41,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129266332] [2021-06-05 04:16:41,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129266332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:41,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063675967] [2021-06-05 04:16:41,306 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:41,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:16:41,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:41,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 04:16:41,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:41,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:41,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:44,031 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 338 [2021-06-05 04:16:44,289 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 779 DAG size of output: 474 [2021-06-05 04:16:44,632 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 524 [2021-06-05 04:16:45,092 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 575 [2021-06-05 04:16:45,525 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 575 [2021-06-05 04:16:46,017 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 892 DAG size of output: 580 [2021-06-05 04:16:46,594 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 697 [2021-06-05 04:16:46,892 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 342 [2021-06-05 04:16:47,743 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 493 [2021-06-05 04:16:47,977 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 440 [2021-06-05 04:16:48,465 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 363 [2021-06-05 04:16:48,775 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 431 [2021-06-05 04:16:48,962 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 443 [2021-06-05 04:16:49,202 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 498 [2021-06-05 04:16:49,526 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 492 [2021-06-05 04:16:49,816 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 492 [2021-06-05 04:16:50,132 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 496 [2021-06-05 04:16:50,325 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 340 [2021-06-05 04:16:50,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:50,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:50,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:50,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:50,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063675967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:50,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:50,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:16:50,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648721430] [2021-06-05 04:16:50,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:16:50,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:50,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:16:50,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:50,959 INFO L87 Difference]: Start difference. First operand 1728 states and 5311 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:16:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:51,317 INFO L93 Difference]: Finished difference Result 1933 states and 5906 transitions. [2021-06-05 04:16:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:16:51,317 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 04:16:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:51,319 INFO L225 Difference]: With dead ends: 1933 [2021-06-05 04:16:51,319 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 04:16:51,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:16:51,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 04:16:51,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1883. [2021-06-05 04:16:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.081296493092455) internal successors, (5799), 1882 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 5799 transitions. [2021-06-05 04:16:51,338 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 5799 transitions. Word has length 20 [2021-06-05 04:16:51,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:51,338 INFO L482 AbstractCegarLoop]: Abstraction has 1883 states and 5799 transitions. [2021-06-05 04:16:51,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:16:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 5799 transitions. [2021-06-05 04:16:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:51,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:51,339 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:51,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38709 [2021-06-05 04:16:51,540 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash -800073397, now seen corresponding path program 292 times [2021-06-05 04:16:51,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:51,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417691962] [2021-06-05 04:16:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:51,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:51,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417691962] [2021-06-05 04:16:51,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417691962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:51,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2605058] [2021-06-05 04:16:51,637 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:51,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:51,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:51,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:16:51,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:51,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:51,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:52,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:52,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:52,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:52,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:52,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2605058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:52,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:52,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 04:16:52,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305248613] [2021-06-05 04:16:52,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:16:52,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:52,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:16:52,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:52,850 INFO L87 Difference]: Start difference. First operand 1883 states and 5799 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 04:16:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:53,542 INFO L93 Difference]: Finished difference Result 1955 states and 5932 transitions. [2021-06-05 04:16:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:16:53,543 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 20 [2021-06-05 04:16:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:53,545 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 04:16:53,545 INFO L226 Difference]: Without dead ends: 1950 [2021-06-05 04:16:53,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:16:53,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-06-05 04:16:53,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1883. [2021-06-05 04:16:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.081296493092455) internal successors, (5799), 1882 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 5799 transitions. [2021-06-05 04:16:53,563 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 5799 transitions. Word has length 20 [2021-06-05 04:16:53,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:53,563 INFO L482 AbstractCegarLoop]: Abstraction has 1883 states and 5799 transitions. [2021-06-05 04:16:53,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 04:16:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 5799 transitions. [2021-06-05 04:16:53,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:53,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:53,565 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:53,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39426,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:53,766 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:53,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1461337180, now seen corresponding path program 293 times [2021-06-05 04:16:53,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:53,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626655723] [2021-06-05 04:16:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:53,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:53,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626655723] [2021-06-05 04:16:53,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626655723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:53,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517939954] [2021-06-05 04:16:53,809 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:53,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:16:53,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:53,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:53,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:53,867 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 04:16:53,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517939954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:53,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:53,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:16:53,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189454980] [2021-06-05 04:16:53,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:16:53,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:53,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:16:53,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:16:53,868 INFO L87 Difference]: Start difference. First operand 1883 states and 5799 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 04:16:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:53,954 INFO L93 Difference]: Finished difference Result 2214 states and 6381 transitions. [2021-06-05 04:16:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:16:53,955 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 20 [2021-06-05 04:16:53,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:53,957 INFO L225 Difference]: With dead ends: 2214 [2021-06-05 04:16:53,957 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 04:16:53,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:16:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 04:16:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1898. [2021-06-05 04:16:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 3.084343700579863) internal successors, (5851), 1897 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 5851 transitions. [2021-06-05 04:16:53,976 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 5851 transitions. Word has length 20 [2021-06-05 04:16:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:53,976 INFO L482 AbstractCegarLoop]: Abstraction has 1898 states and 5851 transitions. [2021-06-05 04:16:53,976 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 04:16:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 5851 transitions. [2021-06-05 04:16:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:53,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:53,978 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:54,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39600,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:54,178 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:54,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:54,178 INFO L82 PathProgramCache]: Analyzing trace with hash 772770314, now seen corresponding path program 294 times [2021-06-05 04:16:54,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:54,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027472778] [2021-06-05 04:16:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:54,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:54,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027472778] [2021-06-05 04:16:54,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027472778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:54,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818231768] [2021-06-05 04:16:54,222 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:54,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:16:54,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:54,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:54,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:54,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818231768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:54,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:54,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:16:54,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373346063] [2021-06-05 04:16:54,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:16:54,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:54,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:16:54,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:16:54,280 INFO L87 Difference]: Start difference. First operand 1898 states and 5851 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 04:16:54,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:54,391 INFO L93 Difference]: Finished difference Result 2225 states and 6496 transitions. [2021-06-05 04:16:54,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:16:54,391 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 20 [2021-06-05 04:16:54,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:54,393 INFO L225 Difference]: With dead ends: 2225 [2021-06-05 04:16:54,393 INFO L226 Difference]: Without dead ends: 2225 [2021-06-05 04:16:54,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:16:54,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-05 04:16:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1963. [2021-06-05 04:16:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.0866462793068297) internal successors, (6056), 1962 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6056 transitions. [2021-06-05 04:16:54,413 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6056 transitions. Word has length 20 [2021-06-05 04:16:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:54,413 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 6056 transitions. [2021-06-05 04:16:54,413 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 04:16:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6056 transitions. [2021-06-05 04:16:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:54,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:54,415 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:54,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39601 [2021-06-05 04:16:54,624 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:54,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1310625892, now seen corresponding path program 295 times [2021-06-05 04:16:54,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:54,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803747570] [2021-06-05 04:16:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:54,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:54,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803747570] [2021-06-05 04:16:54,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803747570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:54,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264119123] [2021-06-05 04:16:54,673 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:54,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264119123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:54,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:54,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:16:54,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997577425] [2021-06-05 04:16:54,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:54,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:54,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:54,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:54,734 INFO L87 Difference]: Start difference. First operand 1963 states and 6056 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:54,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:54,861 INFO L93 Difference]: Finished difference Result 2251 states and 6550 transitions. [2021-06-05 04:16:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:16:54,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:54,863 INFO L225 Difference]: With dead ends: 2251 [2021-06-05 04:16:54,863 INFO L226 Difference]: Without dead ends: 2251 [2021-06-05 04:16:54,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:16:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-05 04:16:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1967. [2021-06-05 04:16:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.084944048830112) internal successors, (6065), 1966 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6065 transitions. [2021-06-05 04:16:54,883 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6065 transitions. Word has length 20 [2021-06-05 04:16:54,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:54,883 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 6065 transitions. [2021-06-05 04:16:54,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6065 transitions. [2021-06-05 04:16:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:54,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:54,885 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:55,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39602 [2021-06-05 04:16:55,086 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash -2007552732, now seen corresponding path program 296 times [2021-06-05 04:16:55,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:55,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348918763] [2021-06-05 04:16:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:55,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:55,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348918763] [2021-06-05 04:16:55,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348918763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:55,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699794626] [2021-06-05 04:16:55,132 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:55,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:55,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:55,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:55,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:55,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699794626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:55,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:55,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:16:55,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23269054] [2021-06-05 04:16:55,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:55,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:55,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:55,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:55,192 INFO L87 Difference]: Start difference. First operand 1967 states and 6065 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:55,269 INFO L93 Difference]: Finished difference Result 2072 states and 6290 transitions. [2021-06-05 04:16:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:16:55,269 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:55,271 INFO L225 Difference]: With dead ends: 2072 [2021-06-05 04:16:55,271 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 04:16:55,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:16:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 04:16:55,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2004. [2021-06-05 04:16:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.0833749375936095) internal successors, (6176), 2003 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6176 transitions. [2021-06-05 04:16:55,291 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6176 transitions. Word has length 20 [2021-06-05 04:16:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:55,291 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 6176 transitions. [2021-06-05 04:16:55,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6176 transitions. [2021-06-05 04:16:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:55,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:55,292 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:55,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39603 [2021-06-05 04:16:55,493 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1019957386, now seen corresponding path program 297 times [2021-06-05 04:16:55,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:55,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365372322] [2021-06-05 04:16:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:55,546 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 04:16:55,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:55,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365372322] [2021-06-05 04:16:55,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365372322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:55,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555859580] [2021-06-05 04:16:55,546 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:55,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:16:55,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:55,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:55,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555859580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:55,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:55,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:55,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725107523] [2021-06-05 04:16:55,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:55,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:55,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:55,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:55,618 INFO L87 Difference]: Start difference. First operand 2004 states and 6176 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:55,761 INFO L93 Difference]: Finished difference Result 2124 states and 6392 transitions. [2021-06-05 04:16:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:16:55,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:55,763 INFO L225 Difference]: With dead ends: 2124 [2021-06-05 04:16:55,763 INFO L226 Difference]: Without dead ends: 2124 [2021-06-05 04:16:55,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-06-05 04:16:55,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2003. [2021-06-05 04:16:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.083416583416583) internal successors, (6173), 2002 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6173 transitions. [2021-06-05 04:16:55,783 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6173 transitions. Word has length 20 [2021-06-05 04:16:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:55,783 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6173 transitions. [2021-06-05 04:16:55,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6173 transitions. [2021-06-05 04:16:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:55,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:55,784 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:55,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39604 [2021-06-05 04:16:55,985 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:55,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:55,985 INFO L82 PathProgramCache]: Analyzing trace with hash 383490532, now seen corresponding path program 298 times [2021-06-05 04:16:55,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:55,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045714738] [2021-06-05 04:16:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:56,043 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 04:16:56,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:56,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045714738] [2021-06-05 04:16:56,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045714738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:56,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327173070] [2021-06-05 04:16:56,043 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:56,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:56,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:56,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:56,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:56,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327173070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:56,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:56,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:56,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109982742] [2021-06-05 04:16:56,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:56,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:56,105 INFO L87 Difference]: Start difference. First operand 2003 states and 6173 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:56,281 INFO L93 Difference]: Finished difference Result 2203 states and 6584 transitions. [2021-06-05 04:16:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:16:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:56,284 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 04:16:56,284 INFO L226 Difference]: Without dead ends: 2203 [2021-06-05 04:16:56,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-05 04:16:56,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2015. [2021-06-05 04:16:56,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.08291956305859) internal successors, (6209), 2014 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 6209 transitions. [2021-06-05 04:16:56,304 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 6209 transitions. Word has length 20 [2021-06-05 04:16:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:56,304 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 6209 transitions. [2021-06-05 04:16:56,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 6209 transitions. [2021-06-05 04:16:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:56,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:56,306 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:56,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39605 [2021-06-05 04:16:56,506 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:56,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:56,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2127854538, now seen corresponding path program 299 times [2021-06-05 04:16:56,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:56,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034088731] [2021-06-05 04:16:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:56,567 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 04:16:56,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:56,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034088731] [2021-06-05 04:16:56,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034088731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:56,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749070852] [2021-06-05 04:16:56,568 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:56,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:16:56,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:56,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:16:56,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:56,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749070852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:56,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:56,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:16:56,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831145988] [2021-06-05 04:16:56,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:56,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:56,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:56,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:56,630 INFO L87 Difference]: Start difference. First operand 2015 states and 6209 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:56,821 INFO L93 Difference]: Finished difference Result 2375 states and 7049 transitions. [2021-06-05 04:16:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:16:56,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:16:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:56,824 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 04:16:56,824 INFO L226 Difference]: Without dead ends: 2375 [2021-06-05 04:16:56,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:16:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-06-05 04:16:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2034. [2021-06-05 04:16:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 3.0821446138711264) internal successors, (6266), 2033 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 6266 transitions. [2021-06-05 04:16:56,844 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 6266 transitions. Word has length 20 [2021-06-05 04:16:56,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:56,844 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 6266 transitions. [2021-06-05 04:16:56,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:56,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 6266 transitions. [2021-06-05 04:16:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:16:56,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:56,846 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:57,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39606,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:57,047 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:57,047 INFO L82 PathProgramCache]: Analyzing trace with hash 248568699, now seen corresponding path program 300 times [2021-06-05 04:16:57,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:57,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779065448] [2021-06-05 04:16:57,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:57,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:57,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779065448] [2021-06-05 04:16:57,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779065448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:57,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837136207] [2021-06-05 04:16:57,112 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:57,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:16:57,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:57,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:16:57,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:57,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837136207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:57,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:57,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:16:57,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667609498] [2021-06-05 04:16:57,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:57,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:57,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:57,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:57,182 INFO L87 Difference]: Start difference. First operand 2034 states and 6266 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:57,312 INFO L93 Difference]: Finished difference Result 2216 states and 6557 transitions. [2021-06-05 04:16:57,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:16:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:16:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:57,315 INFO L225 Difference]: With dead ends: 2216 [2021-06-05 04:16:57,315 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 04:16:57,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 04:16:57,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2020. [2021-06-05 04:16:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.0787518573551265) internal successors, (6216), 2019 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 6216 transitions. [2021-06-05 04:16:57,335 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 6216 transitions. Word has length 21 [2021-06-05 04:16:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:57,335 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 6216 transitions. [2021-06-05 04:16:57,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 6216 transitions. [2021-06-05 04:16:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:16:57,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:57,337 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:57,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39607 [2021-06-05 04:16:57,538 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:57,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:57,538 INFO L82 PathProgramCache]: Analyzing trace with hash 905361256, now seen corresponding path program 301 times [2021-06-05 04:16:57,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:57,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922199919] [2021-06-05 04:16:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:57,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922199919] [2021-06-05 04:16:57,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922199919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202139998] [2021-06-05 04:16:57,603 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:57,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:16:57,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202139998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:57,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:57,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:16:57,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678200177] [2021-06-05 04:16:57,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:57,662 INFO L87 Difference]: Start difference. First operand 2020 states and 6216 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:57,883 INFO L93 Difference]: Finished difference Result 2358 states and 6864 transitions. [2021-06-05 04:16:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:16:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:16:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:57,886 INFO L225 Difference]: With dead ends: 2358 [2021-06-05 04:16:57,886 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 04:16:57,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:16:57,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 04:16:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1996. [2021-06-05 04:16:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.0716791979949876) internal successors, (6128), 1995 states have internal predecessors, (6128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6128 transitions. [2021-06-05 04:16:57,908 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6128 transitions. Word has length 21 [2021-06-05 04:16:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:57,908 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6128 transitions. [2021-06-05 04:16:57,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6128 transitions. [2021-06-05 04:16:57,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:16:57,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:57,910 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:58,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39608 [2021-06-05 04:16:58,111 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:58,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:58,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1825157759, now seen corresponding path program 302 times [2021-06-05 04:16:58,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:58,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616002127] [2021-06-05 04:16:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:58,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:58,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616002127] [2021-06-05 04:16:58,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616002127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:58,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133469163] [2021-06-05 04:16:58,166 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:58,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:58,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:58,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:16:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:58,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133469163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:58,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:58,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:16:58,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159486803] [2021-06-05 04:16:58,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:58,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:58,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:58,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:58,225 INFO L87 Difference]: Start difference. First operand 1996 states and 6128 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:58,351 INFO L93 Difference]: Finished difference Result 2055 states and 6217 transitions. [2021-06-05 04:16:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:16:58,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:16:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:58,353 INFO L225 Difference]: With dead ends: 2055 [2021-06-05 04:16:58,353 INFO L226 Difference]: Without dead ends: 2051 [2021-06-05 04:16:58,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:16:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-05 04:16:58,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1996. [2021-06-05 04:16:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.069674185463659) internal successors, (6124), 1995 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6124 transitions. [2021-06-05 04:16:58,374 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6124 transitions. Word has length 21 [2021-06-05 04:16:58,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:58,374 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6124 transitions. [2021-06-05 04:16:58,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6124 transitions. [2021-06-05 04:16:58,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:16:58,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:58,375 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:58,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39609,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:58,576 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:58,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1163893976, now seen corresponding path program 303 times [2021-06-05 04:16:58,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:58,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407724814] [2021-06-05 04:16:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:58,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:58,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407724814] [2021-06-05 04:16:58,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407724814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:58,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820967592] [2021-06-05 04:16:58,630 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 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:58,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:16:58,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:58,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:16:58,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:58,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820967592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:58,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:58,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:16:58,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250456743] [2021-06-05 04:16:58,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:58,696 INFO L87 Difference]: Start difference. First operand 1996 states and 6124 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:58,766 INFO L93 Difference]: Finished difference Result 2326 states and 6716 transitions. [2021-06-05 04:16:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:16:58,766 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:16:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:58,768 INFO L225 Difference]: With dead ends: 2326 [2021-06-05 04:16:58,768 INFO L226 Difference]: Without dead ends: 2326 [2021-06-05 04:16:58,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-06-05 04:16:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1980. [2021-06-05 04:16:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.064679130874179) internal successors, (6065), 1979 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6065 transitions. [2021-06-05 04:16:58,792 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6065 transitions. Word has length 21 [2021-06-05 04:16:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:58,792 INFO L482 AbstractCegarLoop]: Abstraction has 1980 states and 6065 transitions. [2021-06-05 04:16:58,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:58,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6065 transitions. [2021-06-05 04:16:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:16:58,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:58,794 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:58,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39610 [2021-06-05 04:16:58,994 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:58,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:58,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1822635909, now seen corresponding path program 304 times [2021-06-05 04:16:58,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:58,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47790246] [2021-06-05 04:16:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:59,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:59,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47790246] [2021-06-05 04:16:59,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47790246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:59,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234545395] [2021-06-05 04:16:59,046 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 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:59,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:59,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:59,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:16:59,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:59,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234545395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:59,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:59,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:16:59,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716044210] [2021-06-05 04:16:59,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:59,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:59,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:59,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:59,106 INFO L87 Difference]: Start difference. First operand 1980 states and 6065 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:59,225 INFO L93 Difference]: Finished difference Result 2084 states and 6271 transitions. [2021-06-05 04:16:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:16:59,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:16:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:59,228 INFO L225 Difference]: With dead ends: 2084 [2021-06-05 04:16:59,228 INFO L226 Difference]: Without dead ends: 2076 [2021-06-05 04:16:59,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:16:59,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-06-05 04:16:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1988. [2021-06-05 04:16:59,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 3.06341217916457) internal successors, (6087), 1987 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 6087 transitions. [2021-06-05 04:16:59,248 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 6087 transitions. Word has length 21 [2021-06-05 04:16:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:59,248 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 6087 transitions. [2021-06-05 04:16:59,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 6087 transitions. [2021-06-05 04:16:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:16:59,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:59,250 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:59,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39611,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:59,450 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:59,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:59,451 INFO L82 PathProgramCache]: Analyzing trace with hash -865456514, now seen corresponding path program 305 times [2021-06-05 04:16:59,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:59,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115096661] [2021-06-05 04:16:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:59,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:59,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115096661] [2021-06-05 04:16:59,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115096661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:59,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584735676] [2021-06-05 04:16:59,502 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:59,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:16:59,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:59,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:16:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:59,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584735676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:59,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:59,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:16:59,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10884215] [2021-06-05 04:16:59,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:59,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:59,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:59,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:59,566 INFO L87 Difference]: Start difference. First operand 1988 states and 6087 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:59,652 INFO L93 Difference]: Finished difference Result 2431 states and 6990 transitions. [2021-06-05 04:16:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:16:59,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:16:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:59,654 INFO L225 Difference]: With dead ends: 2431 [2021-06-05 04:16:59,655 INFO L226 Difference]: Without dead ends: 2431 [2021-06-05 04:16:59,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-06-05 04:16:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1991. [2021-06-05 04:16:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.063819095477387) internal successors, (6097), 1990 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 6097 transitions. [2021-06-05 04:16:59,676 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 6097 transitions. Word has length 21 [2021-06-05 04:16:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:59,676 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 6097 transitions. [2021-06-05 04:16:59,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 6097 transitions. [2021-06-05 04:16:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:16:59,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:59,677 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:59,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39612 [2021-06-05 04:16:59,878 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:59,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1059877375, now seen corresponding path program 306 times [2021-06-05 04:16:59,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:59,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462527312] [2021-06-05 04:16:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:59,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:59,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462527312] [2021-06-05 04:16:59,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462527312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:59,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819573649] [2021-06-05 04:16:59,932 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 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:59,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:16:59,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:59,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:16:59,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:59,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819573649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:59,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:59,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:16:59,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269727035] [2021-06-05 04:16:59,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:59,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:59,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:59,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:59,987 INFO L87 Difference]: Start difference. First operand 1991 states and 6097 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:00,109 INFO L93 Difference]: Finished difference Result 2098 states and 6296 transitions. [2021-06-05 04:17:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:00,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:00,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:00,111 INFO L225 Difference]: With dead ends: 2098 [2021-06-05 04:17:00,111 INFO L226 Difference]: Without dead ends: 2086 [2021-06-05 04:17:00,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:17:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-06-05 04:17:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1993. [2021-06-05 04:17:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 3.0607429718875503) internal successors, (6097), 1992 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 6097 transitions. [2021-06-05 04:17:00,131 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 6097 transitions. Word has length 21 [2021-06-05 04:17:00,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:00,131 INFO L482 AbstractCegarLoop]: Abstraction has 1993 states and 6097 transitions. [2021-06-05 04:17:00,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 6097 transitions. [2021-06-05 04:17:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:00,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:00,133 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:00,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39613 [2021-06-05 04:17:00,333 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:00,333 INFO L82 PathProgramCache]: Analyzing trace with hash 649187736, now seen corresponding path program 307 times [2021-06-05 04:17:00,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:00,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125972169] [2021-06-05 04:17:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:00,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:00,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125972169] [2021-06-05 04:17:00,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125972169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:00,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278278830] [2021-06-05 04:17:00,385 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 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:00,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:00,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:00,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278278830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:00,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:00,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:00,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373727567] [2021-06-05 04:17:00,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:00,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:00,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:00,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:00,443 INFO L87 Difference]: Start difference. First operand 1993 states and 6097 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:00,543 INFO L93 Difference]: Finished difference Result 2545 states and 7306 transitions. [2021-06-05 04:17:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:17:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:00,546 INFO L225 Difference]: With dead ends: 2545 [2021-06-05 04:17:00,546 INFO L226 Difference]: Without dead ends: 2545 [2021-06-05 04:17:00,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-06-05 04:17:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 1996. [2021-06-05 04:17:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.0606516290726815) internal successors, (6106), 1995 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6106 transitions. [2021-06-05 04:17:00,569 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6106 transitions. Word has length 21 [2021-06-05 04:17:00,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:00,569 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6106 transitions. [2021-06-05 04:17:00,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6106 transitions. [2021-06-05 04:17:00,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:00,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:00,570 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:00,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39614 [2021-06-05 04:17:00,771 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:00,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1454406011, now seen corresponding path program 308 times [2021-06-05 04:17:00,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:00,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131160948] [2021-06-05 04:17:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:00,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:00,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131160948] [2021-06-05 04:17:00,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131160948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:00,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744204871] [2021-06-05 04:17:00,812 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 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:00,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:00,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:00,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:00,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:17:00,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744204871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:00,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:00,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:17:00,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971625091] [2021-06-05 04:17:00,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:17:00,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:00,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:17:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:17:00,871 INFO L87 Difference]: Start difference. First operand 1996 states and 6106 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:00,936 INFO L93 Difference]: Finished difference Result 2246 states and 6593 transitions. [2021-06-05 04:17:00,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:17:00,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:00,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:00,938 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 04:17:00,939 INFO L226 Difference]: Without dead ends: 2244 [2021-06-05 04:17:00,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-05 04:17:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2004. [2021-06-05 04:17:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.050424363454818) internal successors, (6110), 2003 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6110 transitions. [2021-06-05 04:17:00,960 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6110 transitions. Word has length 21 [2021-06-05 04:17:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:00,960 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 6110 transitions. [2021-06-05 04:17:00,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6110 transitions. [2021-06-05 04:17:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:00,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:00,962 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:01,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39615 [2021-06-05 04:17:01,162 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1535536296, now seen corresponding path program 309 times [2021-06-05 04:17:01,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:01,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524462403] [2021-06-05 04:17:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:01,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:01,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524462403] [2021-06-05 04:17:01,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524462403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:01,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495902732] [2021-06-05 04:17:01,201 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 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:01,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:01,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:01,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:01,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:17:01,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495902732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:01,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:01,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:17:01,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181748504] [2021-06-05 04:17:01,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:17:01,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:01,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:17:01,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:17:01,256 INFO L87 Difference]: Start difference. First operand 2004 states and 6110 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:01,370 INFO L93 Difference]: Finished difference Result 2256 states and 6538 transitions. [2021-06-05 04:17:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:01,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:01,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:01,373 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 04:17:01,373 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 04:17:01,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 04:17:01,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2016. [2021-06-05 04:17:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 3.04863523573201) internal successors, (6143), 2015 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 6143 transitions. [2021-06-05 04:17:01,394 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 6143 transitions. Word has length 21 [2021-06-05 04:17:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:01,394 INFO L482 AbstractCegarLoop]: Abstraction has 2016 states and 6143 transitions. [2021-06-05 04:17:01,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 6143 transitions. [2021-06-05 04:17:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:01,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:01,395 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:01,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39616,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:01,596 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:01,596 INFO L82 PathProgramCache]: Analyzing trace with hash 327009918, now seen corresponding path program 310 times [2021-06-05 04:17:01,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:01,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902863803] [2021-06-05 04:17:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:01,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:01,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902863803] [2021-06-05 04:17:01,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902863803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:01,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074536030] [2021-06-05 04:17:01,645 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 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:01,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:01,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:01,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:01,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:01,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074536030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:01,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:01,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:17:01,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773199701] [2021-06-05 04:17:01,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:17:01,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:01,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:17:01,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:17:01,702 INFO L87 Difference]: Start difference. First operand 2016 states and 6143 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 04:17:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:01,775 INFO L93 Difference]: Finished difference Result 2369 states and 6830 transitions. [2021-06-05 04:17:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:17:01,775 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 04:17:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:01,777 INFO L225 Difference]: With dead ends: 2369 [2021-06-05 04:17:01,777 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 04:17:01,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 04:17:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2015. [2021-06-05 04:17:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.048162859980139) internal successors, (6139), 2014 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:01,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 6139 transitions. [2021-06-05 04:17:01,799 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 6139 transitions. Word has length 21 [2021-06-05 04:17:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:01,799 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 6139 transitions. [2021-06-05 04:17:01,799 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 04:17:01,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 6139 transitions. [2021-06-05 04:17:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:01,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:01,800 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:02,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39617 [2021-06-05 04:17:02,001 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:02,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:02,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1275555135, now seen corresponding path program 311 times [2021-06-05 04:17:02,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:02,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79680078] [2021-06-05 04:17:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:02,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:02,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79680078] [2021-06-05 04:17:02,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79680078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:02,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543789531] [2021-06-05 04:17:02,052 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 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:02,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:17:02,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:02,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:02,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:02,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543789531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:02,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:02,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:02,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307869499] [2021-06-05 04:17:02,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:02,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:02,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:02,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:02,108 INFO L87 Difference]: Start difference. First operand 2015 states and 6139 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:02,232 INFO L93 Difference]: Finished difference Result 2175 states and 6426 transitions. [2021-06-05 04:17:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:02,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:02,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:02,235 INFO L225 Difference]: With dead ends: 2175 [2021-06-05 04:17:02,235 INFO L226 Difference]: Without dead ends: 2157 [2021-06-05 04:17:02,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:17:02,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-06-05 04:17:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1987. [2021-06-05 04:17:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 3.0463242698892246) internal successors, (6050), 1986 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 6050 transitions. [2021-06-05 04:17:02,255 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 6050 transitions. Word has length 21 [2021-06-05 04:17:02,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:02,255 INFO L482 AbstractCegarLoop]: Abstraction has 1987 states and 6050 transitions. [2021-06-05 04:17:02,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:02,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 6050 transitions. [2021-06-05 04:17:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:02,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:02,257 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:02,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39618 [2021-06-05 04:17:02,458 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:02,458 INFO L82 PathProgramCache]: Analyzing trace with hash 864865496, now seen corresponding path program 312 times [2021-06-05 04:17:02,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:02,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284537887] [2021-06-05 04:17:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:02,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:02,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284537887] [2021-06-05 04:17:02,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284537887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:02,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591793071] [2021-06-05 04:17:02,507 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 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:02,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:17:02,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:02,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:02,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591793071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:02,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:02,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:02,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36954680] [2021-06-05 04:17:02,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:02,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:02,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:02,571 INFO L87 Difference]: Start difference. First operand 1987 states and 6050 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:02,695 INFO L93 Difference]: Finished difference Result 2488 states and 7125 transitions. [2021-06-05 04:17:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:17:02,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:02,697 INFO L225 Difference]: With dead ends: 2488 [2021-06-05 04:17:02,697 INFO L226 Difference]: Without dead ends: 2488 [2021-06-05 04:17:02,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-06-05 04:17:02,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1994. [2021-06-05 04:17:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.046161565479177) internal successors, (6071), 1993 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6071 transitions. [2021-06-05 04:17:02,718 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6071 transitions. Word has length 21 [2021-06-05 04:17:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:02,718 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6071 transitions. [2021-06-05 04:17:02,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6071 transitions. [2021-06-05 04:17:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:02,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:02,720 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:02,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39619,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:02,920 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:02,921 INFO L82 PathProgramCache]: Analyzing trace with hash 223475963, now seen corresponding path program 313 times [2021-06-05 04:17:02,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:02,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592201019] [2021-06-05 04:17:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:02,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:02,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592201019] [2021-06-05 04:17:02,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592201019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:02,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260635668] [2021-06-05 04:17:02,988 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 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:03,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:03,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260635668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:03,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:03,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:03,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694031672] [2021-06-05 04:17:03,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:03,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:03,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:03,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:03,048 INFO L87 Difference]: Start difference. First operand 1994 states and 6071 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:03,165 INFO L93 Difference]: Finished difference Result 2166 states and 6392 transitions. [2021-06-05 04:17:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:03,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:03,167 INFO L225 Difference]: With dead ends: 2166 [2021-06-05 04:17:03,167 INFO L226 Difference]: Without dead ends: 2158 [2021-06-05 04:17:03,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-06-05 04:17:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 2000. [2021-06-05 04:17:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.0400200100050023) internal successors, (6077), 1999 states have internal predecessors, (6077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:03,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 6077 transitions. [2021-06-05 04:17:03,188 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 6077 transitions. Word has length 21 [2021-06-05 04:17:03,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:03,188 INFO L482 AbstractCegarLoop]: Abstraction has 2000 states and 6077 transitions. [2021-06-05 04:17:03,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:03,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 6077 transitions. [2021-06-05 04:17:03,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:03,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:03,190 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:03,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39620,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:03,390 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:03,391 INFO L82 PathProgramCache]: Analyzing trace with hash 358519230, now seen corresponding path program 314 times [2021-06-05 04:17:03,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:03,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508540194] [2021-06-05 04:17:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:03,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:03,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508540194] [2021-06-05 04:17:03,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508540194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:03,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517606508] [2021-06-05 04:17:03,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:03,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:03,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:03,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:03,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:03,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517606508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:03,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:03,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:03,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082324138] [2021-06-05 04:17:03,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:03,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:03,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:03,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:03,517 INFO L87 Difference]: Start difference. First operand 2000 states and 6077 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:03,660 INFO L93 Difference]: Finished difference Result 2684 states and 7629 transitions. [2021-06-05 04:17:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:17:03,660 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:03,663 INFO L225 Difference]: With dead ends: 2684 [2021-06-05 04:17:03,663 INFO L226 Difference]: Without dead ends: 2684 [2021-06-05 04:17:03,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-06-05 04:17:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 1877. [2021-06-05 04:17:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.031449893390192) internal successors, (5687), 1876 states have internal predecessors, (5687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5687 transitions. [2021-06-05 04:17:03,684 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5687 transitions. Word has length 21 [2021-06-05 04:17:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:03,684 INFO L482 AbstractCegarLoop]: Abstraction has 1877 states and 5687 transitions. [2021-06-05 04:17:03,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5687 transitions. [2021-06-05 04:17:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:03,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:03,686 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:03,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39621,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:03,886 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:03,886 INFO L82 PathProgramCache]: Analyzing trace with hash -449518021, now seen corresponding path program 315 times [2021-06-05 04:17:03,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:03,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063849638] [2021-06-05 04:17:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:03,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:03,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063849638] [2021-06-05 04:17:03,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063849638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:03,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623887186] [2021-06-05 04:17:03,925 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 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:03,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:03,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:03,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:03,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:17:03,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623887186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:03,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:03,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:17:03,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688500110] [2021-06-05 04:17:03,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:17:03,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:03,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:17:03,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:17:03,986 INFO L87 Difference]: Start difference. First operand 1877 states and 5687 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:04,050 INFO L93 Difference]: Finished difference Result 2128 states and 6179 transitions. [2021-06-05 04:17:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:17:04,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:04,052 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 04:17:04,052 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 04:17:04,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 04:17:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1878. [2021-06-05 04:17:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.0261054874800215) internal successors, (5680), 1877 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5680 transitions. [2021-06-05 04:17:04,071 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5680 transitions. Word has length 21 [2021-06-05 04:17:04,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:04,072 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5680 transitions. [2021-06-05 04:17:04,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5680 transitions. [2021-06-05 04:17:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:04,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:04,073 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:04,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39622,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:04,274 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:04,274 INFO L82 PathProgramCache]: Analyzing trace with hash -368387736, now seen corresponding path program 316 times [2021-06-05 04:17:04,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:04,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864547462] [2021-06-05 04:17:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:04,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:04,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864547462] [2021-06-05 04:17:04,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864547462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:04,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804688275] [2021-06-05 04:17:04,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:04,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:04,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:04,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:04,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:17:04,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804688275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:04,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:04,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:17:04,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107080890] [2021-06-05 04:17:04,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:17:04,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:04,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:17:04,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:17:04,380 INFO L87 Difference]: Start difference. First operand 1878 states and 5680 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:04,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:04,495 INFO L93 Difference]: Finished difference Result 2105 states and 6036 transitions. [2021-06-05 04:17:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:04,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:04,497 INFO L225 Difference]: With dead ends: 2105 [2021-06-05 04:17:04,497 INFO L226 Difference]: Without dead ends: 2103 [2021-06-05 04:17:04,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-06-05 04:17:04,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1878. [2021-06-05 04:17:04,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.0218433670751197) internal successors, (5672), 1877 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5672 transitions. [2021-06-05 04:17:04,517 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5672 transitions. Word has length 21 [2021-06-05 04:17:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:04,517 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5672 transitions. [2021-06-05 04:17:04,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:04,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5672 transitions. [2021-06-05 04:17:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:04,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:04,519 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:04,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39623 [2021-06-05 04:17:04,721 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:04,721 INFO L82 PathProgramCache]: Analyzing trace with hash -628368897, now seen corresponding path program 317 times [2021-06-05 04:17:04,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:04,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126433422] [2021-06-05 04:17:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:04,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:04,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126433422] [2021-06-05 04:17:04,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126433422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:04,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043028967] [2021-06-05 04:17:04,773 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:04,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:17:04,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:04,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:04,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:04,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043028967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:04,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:04,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:04,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58858023] [2021-06-05 04:17:04,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:04,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:04,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:04,829 INFO L87 Difference]: Start difference. First operand 1878 states and 5672 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:04,959 INFO L93 Difference]: Finished difference Result 2035 states and 5959 transitions. [2021-06-05 04:17:04,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:04,960 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:04,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:04,961 INFO L225 Difference]: With dead ends: 2035 [2021-06-05 04:17:04,961 INFO L226 Difference]: Without dead ends: 2021 [2021-06-05 04:17:04,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:04,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-06-05 04:17:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1848. [2021-06-05 04:17:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.0211153221440172) internal successors, (5580), 1847 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 5580 transitions. [2021-06-05 04:17:04,982 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 5580 transitions. Word has length 21 [2021-06-05 04:17:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:04,983 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 5580 transitions. [2021-06-05 04:17:04,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 5580 transitions. [2021-06-05 04:17:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:04,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:04,984 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:05,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39624 [2021-06-05 04:17:05,185 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:05,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:05,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1039058536, now seen corresponding path program 318 times [2021-06-05 04:17:05,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:05,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269216874] [2021-06-05 04:17:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:05,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:05,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269216874] [2021-06-05 04:17:05,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269216874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:05,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510297852] [2021-06-05 04:17:05,232 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:05,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:17:05,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:05,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:05,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:05,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510297852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:05,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:05,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:05,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079607176] [2021-06-05 04:17:05,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:05,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:05,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:05,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:05,291 INFO L87 Difference]: Start difference. First operand 1848 states and 5580 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:05,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:05,380 INFO L93 Difference]: Finished difference Result 2226 states and 6355 transitions. [2021-06-05 04:17:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:17:05,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:05,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:05,382 INFO L225 Difference]: With dead ends: 2226 [2021-06-05 04:17:05,382 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 04:17:05,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 04:17:05,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1837. [2021-06-05 04:17:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.017429193899782) internal successors, (5540), 1836 states have internal predecessors, (5540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 5540 transitions. [2021-06-05 04:17:05,402 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 5540 transitions. Word has length 21 [2021-06-05 04:17:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:05,402 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 5540 transitions. [2021-06-05 04:17:05,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 5540 transitions. [2021-06-05 04:17:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:05,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:05,404 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:05,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39625 [2021-06-05 04:17:05,604 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:05,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:05,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1680448069, now seen corresponding path program 319 times [2021-06-05 04:17:05,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:05,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627194824] [2021-06-05 04:17:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:05,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:05,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627194824] [2021-06-05 04:17:05,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627194824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:05,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273509545] [2021-06-05 04:17:05,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:05,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:05,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273509545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:05,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:05,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:05,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884175757] [2021-06-05 04:17:05,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:05,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:05,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:05,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:05,716 INFO L87 Difference]: Start difference. First operand 1837 states and 5540 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:05,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:05,860 INFO L93 Difference]: Finished difference Result 2036 states and 5912 transitions. [2021-06-05 04:17:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:17:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:05,862 INFO L225 Difference]: With dead ends: 2036 [2021-06-05 04:17:05,862 INFO L226 Difference]: Without dead ends: 2028 [2021-06-05 04:17:05,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:17:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-06-05 04:17:05,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1837. [2021-06-05 04:17:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.0152505446623095) internal successors, (5536), 1836 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 5536 transitions. [2021-06-05 04:17:05,881 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 5536 transitions. Word has length 21 [2021-06-05 04:17:05,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:05,881 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 5536 transitions. [2021-06-05 04:17:05,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 5536 transitions. [2021-06-05 04:17:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:05,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:05,882 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:06,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39626,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:06,083 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:06,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1545404802, now seen corresponding path program 320 times [2021-06-05 04:17:06,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:06,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317308715] [2021-06-05 04:17:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:06,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317308715] [2021-06-05 04:17:06,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317308715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313964867] [2021-06-05 04:17:06,134 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 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:06,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:06,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:06,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:06,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313964867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:06,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:06,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:06,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802217210] [2021-06-05 04:17:06,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:06,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:06,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:06,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:06,198 INFO L87 Difference]: Start difference. First operand 1837 states and 5536 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:06,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:06,323 INFO L93 Difference]: Finished difference Result 2364 states and 6697 transitions. [2021-06-05 04:17:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:17:06,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:06,326 INFO L225 Difference]: With dead ends: 2364 [2021-06-05 04:17:06,326 INFO L226 Difference]: Without dead ends: 2364 [2021-06-05 04:17:06,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:17:06,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-06-05 04:17:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1754. [2021-06-05 04:17:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.0119794637763833) internal successors, (5280), 1753 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5280 transitions. [2021-06-05 04:17:06,344 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5280 transitions. Word has length 21 [2021-06-05 04:17:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:06,344 INFO L482 AbstractCegarLoop]: Abstraction has 1754 states and 5280 transitions. [2021-06-05 04:17:06,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5280 transitions. [2021-06-05 04:17:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:06,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:06,346 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:06,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39627 [2021-06-05 04:17:06,546 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash 64835967, now seen corresponding path program 321 times [2021-06-05 04:17:06,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:06,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001915951] [2021-06-05 04:17:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:06,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:06,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001915951] [2021-06-05 04:17:06,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001915951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:06,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486694065] [2021-06-05 04:17:06,601 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:06,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:06,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:06,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:06,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:06,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486694065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:06,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:06,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:06,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904921256] [2021-06-05 04:17:06,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:06,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:06,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:06,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:06,662 INFO L87 Difference]: Start difference. First operand 1754 states and 5280 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:06,785 INFO L93 Difference]: Finished difference Result 2020 states and 5847 transitions. [2021-06-05 04:17:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:06,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:06,787 INFO L225 Difference]: With dead ends: 2020 [2021-06-05 04:17:06,787 INFO L226 Difference]: Without dead ends: 2010 [2021-06-05 04:17:06,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-06-05 04:17:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1756. [2021-06-05 04:17:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 3.0091168091168092) internal successors, (5281), 1755 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5281 transitions. [2021-06-05 04:17:06,805 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5281 transitions. Word has length 21 [2021-06-05 04:17:06,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:06,805 INFO L482 AbstractCegarLoop]: Abstraction has 1756 states and 5281 transitions. [2021-06-05 04:17:06,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:06,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5281 transitions. [2021-06-05 04:17:06,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:06,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:06,806 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:07,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39628,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:07,007 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:07,007 INFO L82 PathProgramCache]: Analyzing trace with hash -62269864, now seen corresponding path program 322 times [2021-06-05 04:17:07,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:07,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233851923] [2021-06-05 04:17:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:07,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:07,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233851923] [2021-06-05 04:17:07,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233851923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:07,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923990643] [2021-06-05 04:17:07,060 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 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:07,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:07,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:07,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:07,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:07,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923990643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:07,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:07,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:07,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498509614] [2021-06-05 04:17:07,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:07,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:07,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:07,124 INFO L87 Difference]: Start difference. First operand 1756 states and 5281 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:07,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:07,312 INFO L93 Difference]: Finished difference Result 3174 states and 9068 transitions. [2021-06-05 04:17:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:07,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:07,315 INFO L225 Difference]: With dead ends: 3174 [2021-06-05 04:17:07,315 INFO L226 Difference]: Without dead ends: 3174 [2021-06-05 04:17:07,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:17:07,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-05 04:17:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 1885. [2021-06-05 04:17:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.0031847133757963) internal successors, (5658), 1884 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 5658 transitions. [2021-06-05 04:17:07,338 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 5658 transitions. Word has length 21 [2021-06-05 04:17:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:07,338 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 5658 transitions. [2021-06-05 04:17:07,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 5658 transitions. [2021-06-05 04:17:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:07,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:07,340 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:07,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39629 [2021-06-05 04:17:07,540 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:07,541 INFO L82 PathProgramCache]: Analyzing trace with hash 658379131, now seen corresponding path program 323 times [2021-06-05 04:17:07,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:07,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246216251] [2021-06-05 04:17:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:07,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:07,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246216251] [2021-06-05 04:17:07,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246216251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945705194] [2021-06-05 04:17:07,580 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:07,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:17:07,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945705194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:07,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:07,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:17:07,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267278688] [2021-06-05 04:17:07,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:17:07,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:07,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:17:07,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:17:07,641 INFO L87 Difference]: Start difference. First operand 1885 states and 5658 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:07,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:07,710 INFO L93 Difference]: Finished difference Result 2149 states and 6166 transitions. [2021-06-05 04:17:07,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:17:07,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:07,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:07,712 INFO L225 Difference]: With dead ends: 2149 [2021-06-05 04:17:07,712 INFO L226 Difference]: Without dead ends: 2147 [2021-06-05 04:17:07,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:17:07,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-06-05 04:17:07,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1876. [2021-06-05 04:17:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.9994666666666667) internal successors, (5624), 1875 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5624 transitions. [2021-06-05 04:17:07,731 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5624 transitions. Word has length 21 [2021-06-05 04:17:07,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:07,731 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5624 transitions. [2021-06-05 04:17:07,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5624 transitions. [2021-06-05 04:17:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:07,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:07,733 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:07,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39630,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:07,933 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:07,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:07,934 INFO L82 PathProgramCache]: Analyzing trace with hash 739509416, now seen corresponding path program 324 times [2021-06-05 04:17:07,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:07,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054508779] [2021-06-05 04:17:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:07,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:07,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054508779] [2021-06-05 04:17:07,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054508779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:07,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081760443] [2021-06-05 04:17:07,969 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:07,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:17:07,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:07,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:07,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:17:08,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081760443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:08,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:08,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:17:08,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147494576] [2021-06-05 04:17:08,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:17:08,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:08,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:17:08,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:17:08,030 INFO L87 Difference]: Start difference. First operand 1876 states and 5624 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:08,145 INFO L93 Difference]: Finished difference Result 2097 states and 6031 transitions. [2021-06-05 04:17:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:08,147 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 04:17:08,148 INFO L226 Difference]: Without dead ends: 2095 [2021-06-05 04:17:08,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-06-05 04:17:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1899. [2021-06-05 04:17:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 3.0010537407797684) internal successors, (5696), 1898 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5696 transitions. [2021-06-05 04:17:08,169 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5696 transitions. Word has length 21 [2021-06-05 04:17:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:08,169 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5696 transitions. [2021-06-05 04:17:08,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5696 transitions. [2021-06-05 04:17:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:08,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:08,170 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:08,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39631,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:08,371 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:08,371 INFO L82 PathProgramCache]: Analyzing trace with hash 479528255, now seen corresponding path program 325 times [2021-06-05 04:17:08,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:08,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754603539] [2021-06-05 04:17:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:08,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:08,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754603539] [2021-06-05 04:17:08,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754603539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:08,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240839468] [2021-06-05 04:17:08,422 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:08,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:08,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240839468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:08,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:08,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:08,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30718029] [2021-06-05 04:17:08,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:08,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:08,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:08,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:08,476 INFO L87 Difference]: Start difference. First operand 1899 states and 5696 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:08,617 INFO L93 Difference]: Finished difference Result 2154 states and 6140 transitions. [2021-06-05 04:17:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:08,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:08,619 INFO L225 Difference]: With dead ends: 2154 [2021-06-05 04:17:08,619 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 04:17:08,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:08,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 04:17:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1861. [2021-06-05 04:17:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1860 states have (on average 2.9935483870967743) internal successors, (5568), 1860 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 5568 transitions. [2021-06-05 04:17:08,640 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 5568 transitions. Word has length 21 [2021-06-05 04:17:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:08,640 INFO L482 AbstractCegarLoop]: Abstraction has 1861 states and 5568 transitions. [2021-06-05 04:17:08,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 5568 transitions. [2021-06-05 04:17:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:08,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:08,641 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:08,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39632,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:08,842 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash -572550917, now seen corresponding path program 326 times [2021-06-05 04:17:08,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:08,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790177408] [2021-06-05 04:17:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:08,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:08,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790177408] [2021-06-05 04:17:08,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790177408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:08,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53108733] [2021-06-05 04:17:08,901 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 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:08,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:08,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:08,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:08,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:08,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53108733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:08,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:08,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:08,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041755173] [2021-06-05 04:17:08,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:08,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:08,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:08,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:08,957 INFO L87 Difference]: Start difference. First operand 1861 states and 5568 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:09,125 INFO L93 Difference]: Finished difference Result 2057 states and 5928 transitions. [2021-06-05 04:17:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:09,125 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:09,127 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 04:17:09,127 INFO L226 Difference]: Without dead ends: 2041 [2021-06-05 04:17:09,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-06-05 04:17:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1865. [2021-06-05 04:17:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.984978540772532) internal successors, (5564), 1864 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 5564 transitions. [2021-06-05 04:17:09,146 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 5564 transitions. Word has length 21 [2021-06-05 04:17:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:09,146 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 5564 transitions. [2021-06-05 04:17:09,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 5564 transitions. [2021-06-05 04:17:09,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:09,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:09,147 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:09,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39633,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:09,348 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash -437507650, now seen corresponding path program 327 times [2021-06-05 04:17:09,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:09,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581546463] [2021-06-05 04:17:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:09,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:09,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581546463] [2021-06-05 04:17:09,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581546463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:09,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875529910] [2021-06-05 04:17:09,399 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:09,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:09,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:09,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:09,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:09,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875529910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:09,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:09,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:09,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967738476] [2021-06-05 04:17:09,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:09,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:09,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:09,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:09,458 INFO L87 Difference]: Start difference. First operand 1865 states and 5564 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:09,564 INFO L93 Difference]: Finished difference Result 2235 states and 6339 transitions. [2021-06-05 04:17:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:17:09,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:09,566 INFO L225 Difference]: With dead ends: 2235 [2021-06-05 04:17:09,566 INFO L226 Difference]: Without dead ends: 2235 [2021-06-05 04:17:09,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:17:09,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-06-05 04:17:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1818. [2021-06-05 04:17:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.977435332966428) internal successors, (5410), 1817 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5410 transitions. [2021-06-05 04:17:09,584 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5410 transitions. Word has length 21 [2021-06-05 04:17:09,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:09,585 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5410 transitions. [2021-06-05 04:17:09,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:09,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5410 transitions. [2021-06-05 04:17:09,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:09,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:09,586 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:09,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39634,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:09,787 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1172733119, now seen corresponding path program 328 times [2021-06-05 04:17:09,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:09,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053141191] [2021-06-05 04:17:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:09,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:09,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053141191] [2021-06-05 04:17:09,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053141191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:09,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971762282] [2021-06-05 04:17:09,847 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:09,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:09,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:09,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:09,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:09,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971762282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:09,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:09,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:09,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958253002] [2021-06-05 04:17:09,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:09,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:09,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:09,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:09,908 INFO L87 Difference]: Start difference. First operand 1818 states and 5410 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:10,040 INFO L93 Difference]: Finished difference Result 2108 states and 6025 transitions. [2021-06-05 04:17:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:10,042 INFO L225 Difference]: With dead ends: 2108 [2021-06-05 04:17:10,042 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 04:17:10,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:17:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 04:17:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1818. [2021-06-05 04:17:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.976884975233902) internal successors, (5409), 1817 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5409 transitions. [2021-06-05 04:17:10,060 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5409 transitions. Word has length 21 [2021-06-05 04:17:10,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:10,060 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5409 transitions. [2021-06-05 04:17:10,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:10,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5409 transitions. [2021-06-05 04:17:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:10,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:10,062 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:10,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39635 [2021-06-05 04:17:10,262 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:10,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1045627288, now seen corresponding path program 329 times [2021-06-05 04:17:10,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:10,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279787885] [2021-06-05 04:17:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:10,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:10,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279787885] [2021-06-05 04:17:10,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279787885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:10,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593847665] [2021-06-05 04:17:10,316 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:10,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:17:10,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:10,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:10,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:10,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593847665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:10,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:10,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:10,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321161281] [2021-06-05 04:17:10,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:10,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:10,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:10,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:10,374 INFO L87 Difference]: Start difference. First operand 1818 states and 5409 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:10,529 INFO L93 Difference]: Finished difference Result 3306 states and 9499 transitions. [2021-06-05 04:17:10,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:17:10,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:10,533 INFO L225 Difference]: With dead ends: 3306 [2021-06-05 04:17:10,533 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 04:17:10,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:10,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 04:17:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 1865. [2021-06-05 04:17:10,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.962982832618026) internal successors, (5523), 1864 states have internal predecessors, (5523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 5523 transitions. [2021-06-05 04:17:10,565 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 5523 transitions. Word has length 21 [2021-06-05 04:17:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:10,565 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 5523 transitions. [2021-06-05 04:17:10,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 5523 transitions. [2021-06-05 04:17:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:10,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:10,566 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:10,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39636 [2021-06-05 04:17:10,767 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:10,767 INFO L82 PathProgramCache]: Analyzing trace with hash -558036613, now seen corresponding path program 330 times [2021-06-05 04:17:10,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:10,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704824845] [2021-06-05 04:17:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:10,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:10,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704824845] [2021-06-05 04:17:10,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704824845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:10,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989966923] [2021-06-05 04:17:10,830 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:10,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:17:10,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:10,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989966923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:10,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:10,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:10,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991851570] [2021-06-05 04:17:10,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:10,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:10,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:10,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:10,885 INFO L87 Difference]: Start difference. First operand 1865 states and 5523 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:11,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:11,001 INFO L93 Difference]: Finished difference Result 2163 states and 6155 transitions. [2021-06-05 04:17:11,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:11,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:11,004 INFO L225 Difference]: With dead ends: 2163 [2021-06-05 04:17:11,004 INFO L226 Difference]: Without dead ends: 2151 [2021-06-05 04:17:11,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:17:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-05 04:17:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1867. [2021-06-05 04:17:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9608788853161845) internal successors, (5525), 1866 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5525 transitions. [2021-06-05 04:17:11,024 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5525 transitions. Word has length 21 [2021-06-05 04:17:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:11,024 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 5525 transitions. [2021-06-05 04:17:11,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5525 transitions. [2021-06-05 04:17:11,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:11,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:11,026 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:11,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39637 [2021-06-05 04:17:11,226 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:11,227 INFO L82 PathProgramCache]: Analyzing trace with hash -221829890, now seen corresponding path program 331 times [2021-06-05 04:17:11,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:11,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415072658] [2021-06-05 04:17:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:11,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:11,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415072658] [2021-06-05 04:17:11,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415072658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:11,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13415458] [2021-06-05 04:17:11,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:11,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:11,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:11,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13415458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:11,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:11,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:11,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621040263] [2021-06-05 04:17:11,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:11,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:11,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:11,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:11,342 INFO L87 Difference]: Start difference. First operand 1867 states and 5525 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:11,557 INFO L93 Difference]: Finished difference Result 3350 states and 9497 transitions. [2021-06-05 04:17:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:17:11,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:11,560 INFO L225 Difference]: With dead ends: 3350 [2021-06-05 04:17:11,560 INFO L226 Difference]: Without dead ends: 3350 [2021-06-05 04:17:11,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=336, Invalid=656, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:17:11,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-06-05 04:17:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 1964. [2021-06-05 04:17:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 2.957717778909832) internal successors, (5806), 1963 states have internal predecessors, (5806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 5806 transitions. [2021-06-05 04:17:11,583 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 5806 transitions. Word has length 21 [2021-06-05 04:17:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:11,583 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 5806 transitions. [2021-06-05 04:17:11,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 5806 transitions. [2021-06-05 04:17:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:11,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:11,584 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:11,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39638 [2021-06-05 04:17:11,785 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:11,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:11,785 INFO L82 PathProgramCache]: Analyzing trace with hash 496894629, now seen corresponding path program 332 times [2021-06-05 04:17:11,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:11,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422234562] [2021-06-05 04:17:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:11,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:11,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422234562] [2021-06-05 04:17:11,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422234562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:11,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194342369] [2021-06-05 04:17:11,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:11,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:11,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:11,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:11,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:11,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194342369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:11,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:11,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:17:11,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575466287] [2021-06-05 04:17:11,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:17:11,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:11,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:17:11,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:17:11,893 INFO L87 Difference]: Start difference. First operand 1964 states and 5806 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:11,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:11,976 INFO L93 Difference]: Finished difference Result 2106 states and 6084 transitions. [2021-06-05 04:17:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:17:11,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:11,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:11,979 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 04:17:11,979 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 04:17:11,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 04:17:11,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1970. [2021-06-05 04:17:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.957846622651092) internal successors, (5824), 1969 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5824 transitions. [2021-06-05 04:17:11,997 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5824 transitions. Word has length 21 [2021-06-05 04:17:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:11,998 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5824 transitions. [2021-06-05 04:17:11,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5824 transitions. [2021-06-05 04:17:11,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:11,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:11,999 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:12,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39639 [2021-06-05 04:17:12,200 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:12,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1283033832, now seen corresponding path program 333 times [2021-06-05 04:17:12,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:12,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654672636] [2021-06-05 04:17:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:12,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:12,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654672636] [2021-06-05 04:17:12,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654672636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:12,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500156354] [2021-06-05 04:17:12,259 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:12,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:17:12,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:12,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:12,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:12,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500156354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:12,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:12,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:17:12,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474161619] [2021-06-05 04:17:12,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:17:12,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:12,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:17:12,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:17:12,328 INFO L87 Difference]: Start difference. First operand 1970 states and 5824 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:12,478 INFO L93 Difference]: Finished difference Result 2190 states and 6175 transitions. [2021-06-05 04:17:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:12,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:12,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:12,480 INFO L225 Difference]: With dead ends: 2190 [2021-06-05 04:17:12,480 INFO L226 Difference]: Without dead ends: 2186 [2021-06-05 04:17:12,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-06-05 04:17:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1970. [2021-06-05 04:17:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.95733875063484) internal successors, (5823), 1969 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5823 transitions. [2021-06-05 04:17:12,500 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5823 transitions. Word has length 21 [2021-06-05 04:17:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:12,500 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5823 transitions. [2021-06-05 04:17:12,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5823 transitions. [2021-06-05 04:17:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:12,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:12,502 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:12,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39640,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:12,702 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:12,702 INFO L82 PathProgramCache]: Analyzing trace with hash 49909311, now seen corresponding path program 334 times [2021-06-05 04:17:12,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:12,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980646571] [2021-06-05 04:17:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:12,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:12,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980646571] [2021-06-05 04:17:12,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980646571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:12,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444426161] [2021-06-05 04:17:12,754 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:12,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:12,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:12,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:12,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:12,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444426161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:12,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:12,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:12,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403674095] [2021-06-05 04:17:12,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:12,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:12,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:12,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:12,808 INFO L87 Difference]: Start difference. First operand 1970 states and 5823 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:12,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:12,897 INFO L93 Difference]: Finished difference Result 2213 states and 6351 transitions. [2021-06-05 04:17:12,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:17:12,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:12,899 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 04:17:12,899 INFO L226 Difference]: Without dead ends: 2193 [2021-06-05 04:17:12,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2021-06-05 04:17:12,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1970. [2021-06-05 04:17:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.9563230066023363) internal successors, (5821), 1969 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5821 transitions. [2021-06-05 04:17:12,919 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5821 transitions. Word has length 21 [2021-06-05 04:17:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:12,919 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5821 transitions. [2021-06-05 04:17:12,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:12,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5821 transitions. [2021-06-05 04:17:12,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:12,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:12,920 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:13,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39641,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:13,121 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash -77196520, now seen corresponding path program 335 times [2021-06-05 04:17:13,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:13,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998558004] [2021-06-05 04:17:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:13,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:13,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998558004] [2021-06-05 04:17:13,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998558004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:13,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720210338] [2021-06-05 04:17:13,170 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:13,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:17:13,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:13,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:13,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:13,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720210338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:13,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:13,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:13,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931492839] [2021-06-05 04:17:13,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:13,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:13,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:13,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:13,229 INFO L87 Difference]: Start difference. First operand 1970 states and 5821 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:13,410 INFO L93 Difference]: Finished difference Result 2787 states and 7905 transitions. [2021-06-05 04:17:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:13,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:13,413 INFO L225 Difference]: With dead ends: 2787 [2021-06-05 04:17:13,413 INFO L226 Difference]: Without dead ends: 2787 [2021-06-05 04:17:13,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:17:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-05 04:17:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2121. [2021-06-05 04:17:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.9627358490566036) internal successors, (6281), 2120 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6281 transitions. [2021-06-05 04:17:13,435 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6281 transitions. Word has length 21 [2021-06-05 04:17:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:13,436 INFO L482 AbstractCegarLoop]: Abstraction has 2121 states and 6281 transitions. [2021-06-05 04:17:13,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6281 transitions. [2021-06-05 04:17:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:13,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:13,437 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:13,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39642,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:13,638 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:13,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:13,638 INFO L82 PathProgramCache]: Analyzing trace with hash -586557543, now seen corresponding path program 336 times [2021-06-05 04:17:13,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:13,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222468067] [2021-06-05 04:17:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:13,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:13,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222468067] [2021-06-05 04:17:13,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222468067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:13,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673492486] [2021-06-05 04:17:13,697 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 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:13,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:17:13,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:13,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:13,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:13,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673492486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:13,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:13,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:13,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471463400] [2021-06-05 04:17:13,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:13,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:13,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:13,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:13,752 INFO L87 Difference]: Start difference. First operand 2121 states and 6281 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:13,887 INFO L93 Difference]: Finished difference Result 2439 states and 6992 transitions. [2021-06-05 04:17:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:17:13,887 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:13,889 INFO L225 Difference]: With dead ends: 2439 [2021-06-05 04:17:13,889 INFO L226 Difference]: Without dead ends: 2419 [2021-06-05 04:17:13,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:17:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-06-05 04:17:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2121. [2021-06-05 04:17:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.9584905660377356) internal successors, (6272), 2120 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6272 transitions. [2021-06-05 04:17:13,911 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6272 transitions. Word has length 21 [2021-06-05 04:17:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:13,911 INFO L482 AbstractCegarLoop]: Abstraction has 2121 states and 6272 transitions. [2021-06-05 04:17:13,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6272 transitions. [2021-06-05 04:17:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:13,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:13,912 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:14,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39643 [2021-06-05 04:17:14,113 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:14,113 INFO L82 PathProgramCache]: Analyzing trace with hash -713663374, now seen corresponding path program 337 times [2021-06-05 04:17:14,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:14,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692859412] [2021-06-05 04:17:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:14,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:14,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692859412] [2021-06-05 04:17:14,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692859412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:14,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142566657] [2021-06-05 04:17:14,166 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:14,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:14,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:14,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142566657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:14,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:14,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:14,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287610003] [2021-06-05 04:17:14,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:14,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:14,223 INFO L87 Difference]: Start difference. First operand 2121 states and 6272 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:14,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:14,377 INFO L93 Difference]: Finished difference Result 2730 states and 7756 transitions. [2021-06-05 04:17:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:14,380 INFO L225 Difference]: With dead ends: 2730 [2021-06-05 04:17:14,380 INFO L226 Difference]: Without dead ends: 2730 [2021-06-05 04:17:14,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:14,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-06-05 04:17:14,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 1965. [2021-06-05 04:17:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 2.969959266802444) internal successors, (5833), 1964 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 5833 transitions. [2021-06-05 04:17:14,409 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 5833 transitions. Word has length 21 [2021-06-05 04:17:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:14,409 INFO L482 AbstractCegarLoop]: Abstraction has 1965 states and 5833 transitions. [2021-06-05 04:17:14,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 5833 transitions. [2021-06-05 04:17:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:14,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:14,411 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:14,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39644,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:14,611 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:14,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:14,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1977640021, now seen corresponding path program 338 times [2021-06-05 04:17:14,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:14,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521184958] [2021-06-05 04:17:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:14,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:14,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521184958] [2021-06-05 04:17:14,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521184958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:14,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421314523] [2021-06-05 04:17:14,672 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:14,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:14,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:14,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:14,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:14,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421314523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:14,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:14,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:14,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399795252] [2021-06-05 04:17:14,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:14,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:14,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:14,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:14,726 INFO L87 Difference]: Start difference. First operand 1965 states and 5833 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:14,828 INFO L93 Difference]: Finished difference Result 2345 states and 6666 transitions. [2021-06-05 04:17:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:14,830 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 04:17:14,831 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 04:17:14,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:17:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 04:17:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1974. [2021-06-05 04:17:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.964521033958439) internal successors, (5849), 1973 states have internal predecessors, (5849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 5849 transitions. [2021-06-05 04:17:14,851 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 5849 transitions. Word has length 21 [2021-06-05 04:17:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:14,851 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 5849 transitions. [2021-06-05 04:17:14,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 5849 transitions. [2021-06-05 04:17:14,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:14,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:14,852 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:15,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39645 [2021-06-05 04:17:15,053 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:15,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1981120552, now seen corresponding path program 339 times [2021-06-05 04:17:15,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:15,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325428081] [2021-06-05 04:17:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:15,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:15,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325428081] [2021-06-05 04:17:15,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325428081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:15,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197526907] [2021-06-05 04:17:15,110 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:15,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:17:15,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:15,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:15,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197526907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:15,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:15,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:15,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724046182] [2021-06-05 04:17:15,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:15,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:15,170 INFO L87 Difference]: Start difference. First operand 1974 states and 5849 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:15,403 INFO L93 Difference]: Finished difference Result 3098 states and 8778 transitions. [2021-06-05 04:17:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:15,406 INFO L225 Difference]: With dead ends: 3098 [2021-06-05 04:17:15,406 INFO L226 Difference]: Without dead ends: 3098 [2021-06-05 04:17:15,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:17:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-06-05 04:17:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 1904. [2021-06-05 04:17:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.9600630583289544) internal successors, (5633), 1903 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5633 transitions. [2021-06-05 04:17:15,430 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5633 transitions. Word has length 21 [2021-06-05 04:17:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:15,430 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 5633 transitions. [2021-06-05 04:17:15,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5633 transitions. [2021-06-05 04:17:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:15,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:15,431 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:15,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39646,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:15,632 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:15,632 INFO L82 PathProgramCache]: Analyzing trace with hash 643452475, now seen corresponding path program 340 times [2021-06-05 04:17:15,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:15,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085075196] [2021-06-05 04:17:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:15,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:15,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085075196] [2021-06-05 04:17:15,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085075196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:15,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900009752] [2021-06-05 04:17:15,670 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:15,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:15,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:15,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:15,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:15,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900009752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:15,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:15,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:17:15,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976505138] [2021-06-05 04:17:15,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:17:15,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:17:15,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:17:15,729 INFO L87 Difference]: Start difference. First operand 1904 states and 5633 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:15,793 INFO L93 Difference]: Finished difference Result 2228 states and 6256 transitions. [2021-06-05 04:17:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:17:15,794 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:15,795 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 04:17:15,795 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 04:17:15,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:17:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 04:17:15,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1928. [2021-06-05 04:17:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.9709392838609237) internal successors, (5725), 1927 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 5725 transitions. [2021-06-05 04:17:15,814 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 5725 transitions. Word has length 21 [2021-06-05 04:17:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:15,815 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 5725 transitions. [2021-06-05 04:17:15,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 5725 transitions. [2021-06-05 04:17:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:15,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:15,816 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:16,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39647 [2021-06-05 04:17:16,017 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:16,017 INFO L82 PathProgramCache]: Analyzing trace with hash 724582760, now seen corresponding path program 341 times [2021-06-05 04:17:16,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:16,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022624019] [2021-06-05 04:17:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:16,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:16,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022624019] [2021-06-05 04:17:16,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022624019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:16,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584766216] [2021-06-05 04:17:16,067 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:16,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:17:16,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:16,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:16,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:16,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584766216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:16,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:16,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:17:16,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489718277] [2021-06-05 04:17:16,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:17:16,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:16,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:17:16,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:17:16,136 INFO L87 Difference]: Start difference. First operand 1928 states and 5725 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:16,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:16,245 INFO L93 Difference]: Finished difference Result 2105 states and 6019 transitions. [2021-06-05 04:17:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:16,247 INFO L225 Difference]: With dead ends: 2105 [2021-06-05 04:17:16,247 INFO L226 Difference]: Without dead ends: 2103 [2021-06-05 04:17:16,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-06-05 04:17:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1939. [2021-06-05 04:17:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9726522187822497) internal successors, (5761), 1938 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5761 transitions. [2021-06-05 04:17:16,267 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5761 transitions. Word has length 21 [2021-06-05 04:17:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:16,267 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5761 transitions. [2021-06-05 04:17:16,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5761 transitions. [2021-06-05 04:17:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:16,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:16,269 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:16,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39648 [2021-06-05 04:17:16,470 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:16,470 INFO L82 PathProgramCache]: Analyzing trace with hash -587477573, now seen corresponding path program 342 times [2021-06-05 04:17:16,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:16,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012285769] [2021-06-05 04:17:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:16,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:16,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012285769] [2021-06-05 04:17:16,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012285769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:16,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956025867] [2021-06-05 04:17:16,522 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 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:16,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:17:16,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:16,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:16,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:16,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956025867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:16,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:16,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:16,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634592748] [2021-06-05 04:17:16,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:16,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:16,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:16,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:16,583 INFO L87 Difference]: Start difference. First operand 1939 states and 5761 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:16,741 INFO L93 Difference]: Finished difference Result 2242 states and 6291 transitions. [2021-06-05 04:17:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:16,744 INFO L225 Difference]: With dead ends: 2242 [2021-06-05 04:17:16,744 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 04:17:16,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 04:17:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1939. [2021-06-05 04:17:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9623323013415894) internal successors, (5741), 1938 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5741 transitions. [2021-06-05 04:17:16,763 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5741 transitions. Word has length 21 [2021-06-05 04:17:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:16,763 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5741 transitions. [2021-06-05 04:17:16,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5741 transitions. [2021-06-05 04:17:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:16,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:16,765 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:16,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39649 [2021-06-05 04:17:16,966 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:16,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1157806463, now seen corresponding path program 343 times [2021-06-05 04:17:16,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:16,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861854177] [2021-06-05 04:17:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:17,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:17,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861854177] [2021-06-05 04:17:17,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861854177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:17,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574812809] [2021-06-05 04:17:17,024 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:17,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:17,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:17,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574812809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:17,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:17,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:17,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990300284] [2021-06-05 04:17:17,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:17,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:17,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:17,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:17,083 INFO L87 Difference]: Start difference. First operand 1939 states and 5741 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:17,263 INFO L93 Difference]: Finished difference Result 2170 states and 6162 transitions. [2021-06-05 04:17:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:17,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:17,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:17,265 INFO L225 Difference]: With dead ends: 2170 [2021-06-05 04:17:17,265 INFO L226 Difference]: Without dead ends: 2150 [2021-06-05 04:17:17,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-05 04:17:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1941. [2021-06-05 04:17:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.956701030927835) internal successors, (5736), 1940 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5736 transitions. [2021-06-05 04:17:17,285 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5736 transitions. Word has length 21 [2021-06-05 04:17:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:17,285 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5736 transitions. [2021-06-05 04:17:17,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5736 transitions. [2021-06-05 04:17:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:17,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:17,286 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:17,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39650,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:17,487 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:17,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:17,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1030700632, now seen corresponding path program 344 times [2021-06-05 04:17:17,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:17,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177480738] [2021-06-05 04:17:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:17,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:17,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177480738] [2021-06-05 04:17:17,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177480738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:17,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404632351] [2021-06-05 04:17:17,545 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 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:17,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:17,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:17,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:17,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:17,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404632351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:17,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:17,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:17,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918674675] [2021-06-05 04:17:17,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:17,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:17,608 INFO L87 Difference]: Start difference. First operand 1941 states and 5736 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:17,735 INFO L93 Difference]: Finished difference Result 2262 states and 6373 transitions. [2021-06-05 04:17:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:17:17,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:17,737 INFO L225 Difference]: With dead ends: 2262 [2021-06-05 04:17:17,738 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 04:17:17,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 04:17:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1442. [2021-06-05 04:17:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.8986814712005553) internal successors, (4177), 1441 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4177 transitions. [2021-06-05 04:17:17,761 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4177 transitions. Word has length 21 [2021-06-05 04:17:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:17,761 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4177 transitions. [2021-06-05 04:17:17,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4177 transitions. [2021-06-05 04:17:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:17,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:17,762 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:17,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39651,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:17,965 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:17,965 INFO L82 PathProgramCache]: Analyzing trace with hash -572963269, now seen corresponding path program 345 times [2021-06-05 04:17:17,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:17,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267032662] [2021-06-05 04:17:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:18,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:18,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267032662] [2021-06-05 04:17:18,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267032662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:18,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975789085] [2021-06-05 04:17:18,027 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 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:18,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:17:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:18,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:18,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975789085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:18,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:18,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:18,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147645311] [2021-06-05 04:17:18,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:18,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:18,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:18,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:18,094 INFO L87 Difference]: Start difference. First operand 1442 states and 4177 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:18,201 INFO L93 Difference]: Finished difference Result 1911 states and 5213 transitions. [2021-06-05 04:17:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:18,203 INFO L225 Difference]: With dead ends: 1911 [2021-06-05 04:17:18,203 INFO L226 Difference]: Without dead ends: 1899 [2021-06-05 04:17:18,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-05 04:17:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1444. [2021-06-05 04:17:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 2.898128898128898) internal successors, (4182), 1443 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4182 transitions. [2021-06-05 04:17:18,218 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4182 transitions. Word has length 21 [2021-06-05 04:17:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:18,218 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4182 transitions. [2021-06-05 04:17:18,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4182 transitions. [2021-06-05 04:17:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:18,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:18,219 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:18,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39652,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:18,420 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:18,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:18,420 INFO L82 PathProgramCache]: Analyzing trace with hash -236756546, now seen corresponding path program 346 times [2021-06-05 04:17:18,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:18,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798989866] [2021-06-05 04:17:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:18,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:18,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798989866] [2021-06-05 04:17:18,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798989866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:18,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493349261] [2021-06-05 04:17:18,482 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:18,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:18,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:18,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:18,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493349261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:18,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:18,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:18,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077181578] [2021-06-05 04:17:18,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:18,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:18,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:18,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:18,560 INFO L87 Difference]: Start difference. First operand 1444 states and 4182 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:18,754 INFO L93 Difference]: Finished difference Result 2375 states and 6555 transitions. [2021-06-05 04:17:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:18,756 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 04:17:18,756 INFO L226 Difference]: Without dead ends: 2375 [2021-06-05 04:17:18,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:17:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-06-05 04:17:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1721. [2021-06-05 04:17:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 2.9209302325581397) internal successors, (5024), 1720 states have internal predecessors, (5024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5024 transitions. [2021-06-05 04:17:18,774 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5024 transitions. Word has length 21 [2021-06-05 04:17:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:18,775 INFO L482 AbstractCegarLoop]: Abstraction has 1721 states and 5024 transitions. [2021-06-05 04:17:18,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5024 transitions. [2021-06-05 04:17:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:18,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:18,776 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:18,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39653,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:18,980 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:18,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1607749887, now seen corresponding path program 347 times [2021-06-05 04:17:18,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:18,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629212385] [2021-06-05 04:17:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:19,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:19,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629212385] [2021-06-05 04:17:19,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629212385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:19,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680297844] [2021-06-05 04:17:19,045 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:19,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:19,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:19,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:19,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680297844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:19,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:19,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:19,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123418078] [2021-06-05 04:17:19,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:19,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:19,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:19,108 INFO L87 Difference]: Start difference. First operand 1721 states and 5024 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:19,232 INFO L93 Difference]: Finished difference Result 2189 states and 6061 transitions. [2021-06-05 04:17:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:19,234 INFO L225 Difference]: With dead ends: 2189 [2021-06-05 04:17:19,234 INFO L226 Difference]: Without dead ends: 2175 [2021-06-05 04:17:19,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:17:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-06-05 04:17:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1736. [2021-06-05 04:17:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.9129682997118156) internal successors, (5054), 1735 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 5054 transitions. [2021-06-05 04:17:19,252 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 5054 transitions. Word has length 21 [2021-06-05 04:17:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:19,252 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 5054 transitions. [2021-06-05 04:17:19,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 5054 transitions. [2021-06-05 04:17:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:19,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:19,253 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:19,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39654,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:19,454 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:19,454 INFO L82 PathProgramCache]: Analyzing trace with hash -873223400, now seen corresponding path program 348 times [2021-06-05 04:17:19,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:19,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614639215] [2021-06-05 04:17:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:19,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:19,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614639215] [2021-06-05 04:17:19,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614639215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:19,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702834276] [2021-06-05 04:17:19,516 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:19,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:17:19,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:19,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:19,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:19,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702834276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:19,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:19,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:19,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698839838] [2021-06-05 04:17:19,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:19,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:19,583 INFO L87 Difference]: Start difference. First operand 1736 states and 5054 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:19,843 INFO L93 Difference]: Finished difference Result 2910 states and 8090 transitions. [2021-06-05 04:17:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:17:19,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:19,845 INFO L225 Difference]: With dead ends: 2910 [2021-06-05 04:17:19,845 INFO L226 Difference]: Without dead ends: 2910 [2021-06-05 04:17:19,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:17:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-06-05 04:17:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2068. [2021-06-05 04:17:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.9225931301403) internal successors, (6041), 2067 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 6041 transitions. [2021-06-05 04:17:19,867 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 6041 transitions. Word has length 21 [2021-06-05 04:17:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:19,867 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 6041 transitions. [2021-06-05 04:17:19,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 6041 transitions. [2021-06-05 04:17:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:19,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:19,869 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:20,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39655,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:20,070 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:20,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1793458955, now seen corresponding path program 349 times [2021-06-05 04:17:20,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:20,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90292507] [2021-06-05 04:17:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:20,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:20,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90292507] [2021-06-05 04:17:20,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90292507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:20,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298451488] [2021-06-05 04:17:20,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:20,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:20,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:20,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298451488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:20,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:20,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:20,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198507834] [2021-06-05 04:17:20,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:20,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:20,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:20,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:20,177 INFO L87 Difference]: Start difference. First operand 2068 states and 6041 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:20,266 INFO L93 Difference]: Finished difference Result 2357 states and 6621 transitions. [2021-06-05 04:17:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:17:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:20,268 INFO L225 Difference]: With dead ends: 2357 [2021-06-05 04:17:20,268 INFO L226 Difference]: Without dead ends: 2357 [2021-06-05 04:17:20,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-06-05 04:17:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2117. [2021-06-05 04:17:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.9343100189035916) internal successors, (6209), 2116 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6209 transitions. [2021-06-05 04:17:20,289 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6209 transitions. Word has length 21 [2021-06-05 04:17:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:20,289 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 6209 transitions. [2021-06-05 04:17:20,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6209 transitions. [2021-06-05 04:17:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:20,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:20,291 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:20,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39656 [2021-06-05 04:17:20,491 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:20,492 INFO L82 PathProgramCache]: Analyzing trace with hash 13530494, now seen corresponding path program 350 times [2021-06-05 04:17:20,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:20,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6661661] [2021-06-05 04:17:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:20,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:20,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6661661] [2021-06-05 04:17:20,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6661661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:20,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040926946] [2021-06-05 04:17:20,539 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:20,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:20,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:20,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:20,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040926946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:20,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:20,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:20,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732531605] [2021-06-05 04:17:20,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:20,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:20,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:20,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:20,602 INFO L87 Difference]: Start difference. First operand 2117 states and 6209 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:20,775 INFO L93 Difference]: Finished difference Result 2396 states and 6695 transitions. [2021-06-05 04:17:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:17:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:20,777 INFO L225 Difference]: With dead ends: 2396 [2021-06-05 04:17:20,777 INFO L226 Difference]: Without dead ends: 2392 [2021-06-05 04:17:20,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-06-05 04:17:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2136. [2021-06-05 04:17:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.9400468384074943) internal successors, (6277), 2135 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 6277 transitions. [2021-06-05 04:17:20,798 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 6277 transitions. Word has length 21 [2021-06-05 04:17:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:20,799 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 6277 transitions. [2021-06-05 04:17:20,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 6277 transitions. [2021-06-05 04:17:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:20,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:20,800 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:21,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39657 [2021-06-05 04:17:21,001 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2115307227, now seen corresponding path program 351 times [2021-06-05 04:17:21,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:21,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513898476] [2021-06-05 04:17:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:21,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:21,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513898476] [2021-06-05 04:17:21,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513898476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:21,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797762427] [2021-06-05 04:17:21,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:21,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:21,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:21,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:21,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:21,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797762427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:21,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:21,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:17:21,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231577096] [2021-06-05 04:17:21,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:17:21,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:21,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:17:21,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:17:21,101 INFO L87 Difference]: Start difference. First operand 2136 states and 6277 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 04:17:21,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:21,208 INFO L93 Difference]: Finished difference Result 2333 states and 6617 transitions. [2021-06-05 04:17:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:21,208 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 04:17:21,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:21,210 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 04:17:21,210 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 04:17:21,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:17:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 04:17:21,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2136. [2021-06-05 04:17:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.9395784543325525) internal successors, (6276), 2135 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 6276 transitions. [2021-06-05 04:17:21,232 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 6276 transitions. Word has length 21 [2021-06-05 04:17:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:21,232 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 6276 transitions. [2021-06-05 04:17:21,232 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 04:17:21,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 6276 transitions. [2021-06-05 04:17:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:21,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:21,234 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:21,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39658,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:21,434 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:21,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:21,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1518396286, now seen corresponding path program 352 times [2021-06-05 04:17:21,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:21,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276084301] [2021-06-05 04:17:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:21,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:21,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276084301] [2021-06-05 04:17:21,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276084301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:21,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125555908] [2021-06-05 04:17:21,477 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:21,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:21,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:21,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:21,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125555908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:21,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:21,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:17:21,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795660601] [2021-06-05 04:17:21,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:17:21,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:21,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:17:21,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:17:21,534 INFO L87 Difference]: Start difference. First operand 2136 states and 6276 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 04:17:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:21,604 INFO L93 Difference]: Finished difference Result 2457 states and 6862 transitions. [2021-06-05 04:17:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:17:21,604 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 04:17:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:21,606 INFO L225 Difference]: With dead ends: 2457 [2021-06-05 04:17:21,606 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 04:17:21,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 04:17:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2126. [2021-06-05 04:17:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.9345882352941177) internal successors, (6236), 2125 states have internal predecessors, (6236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 6236 transitions. [2021-06-05 04:17:21,631 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 6236 transitions. Word has length 21 [2021-06-05 04:17:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:21,631 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 6236 transitions. [2021-06-05 04:17:21,631 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 04:17:21,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 6236 transitions. [2021-06-05 04:17:21,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:21,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:21,632 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:21,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39659 [2021-06-05 04:17:21,833 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:21,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1020762949, now seen corresponding path program 353 times [2021-06-05 04:17:21,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:21,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013953433] [2021-06-05 04:17:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:21,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:21,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013953433] [2021-06-05 04:17:21,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013953433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:21,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735616947] [2021-06-05 04:17:21,907 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:21,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:17:21,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:21,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:21,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:21,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735616947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:21,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:21,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:21,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770757797] [2021-06-05 04:17:21,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:21,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:21,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:21,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:21,965 INFO L87 Difference]: Start difference. First operand 2126 states and 6236 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:22,080 INFO L93 Difference]: Finished difference Result 2437 states and 6925 transitions. [2021-06-05 04:17:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:22,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:22,083 INFO L225 Difference]: With dead ends: 2437 [2021-06-05 04:17:22,083 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 04:17:22,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:17:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 04:17:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2126. [2021-06-05 04:17:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.9336470588235293) internal successors, (6234), 2125 states have internal predecessors, (6234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 6234 transitions. [2021-06-05 04:17:22,104 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 6234 transitions. Word has length 21 [2021-06-05 04:17:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:22,104 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 6234 transitions. [2021-06-05 04:17:22,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 6234 transitions. [2021-06-05 04:17:22,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:22,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:22,106 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:22,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39660,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:22,306 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:22,307 INFO L82 PathProgramCache]: Analyzing trace with hash -684556226, now seen corresponding path program 354 times [2021-06-05 04:17:22,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:22,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189703305] [2021-06-05 04:17:22,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:22,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:22,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189703305] [2021-06-05 04:17:22,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189703305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:22,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888140330] [2021-06-05 04:17:22,363 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:22,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:17:22,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:22,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:22,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:22,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888140330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:22,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:22,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:22,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938103871] [2021-06-05 04:17:22,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:22,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:22,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:22,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:22,421 INFO L87 Difference]: Start difference. First operand 2126 states and 6234 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:22,623 INFO L93 Difference]: Finished difference Result 2763 states and 7759 transitions. [2021-06-05 04:17:22,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:17:22,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:22,626 INFO L225 Difference]: With dead ends: 2763 [2021-06-05 04:17:22,626 INFO L226 Difference]: Without dead ends: 2763 [2021-06-05 04:17:22,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:17:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-06-05 04:17:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2240. [2021-06-05 04:17:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.9383653416703885) internal successors, (6579), 2239 states have internal predecessors, (6579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 6579 transitions. [2021-06-05 04:17:22,649 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 6579 transitions. Word has length 21 [2021-06-05 04:17:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:22,649 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 6579 transitions. [2021-06-05 04:17:22,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 6579 transitions. [2021-06-05 04:17:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:22,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:22,651 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:22,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39661,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:22,852 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:22,852 INFO L82 PathProgramCache]: Analyzing trace with hash 723601057, now seen corresponding path program 355 times [2021-06-05 04:17:22,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:22,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197280099] [2021-06-05 04:17:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:22,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:22,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197280099] [2021-06-05 04:17:22,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197280099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:22,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972360982] [2021-06-05 04:17:22,912 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:22,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:22,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972360982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:22,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:22,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:22,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327668321] [2021-06-05 04:17:22,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:22,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:22,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:22,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:22,974 INFO L87 Difference]: Start difference. First operand 2240 states and 6579 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:23,131 INFO L93 Difference]: Finished difference Result 2620 states and 7456 transitions. [2021-06-05 04:17:23,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:23,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:23,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:23,134 INFO L225 Difference]: With dead ends: 2620 [2021-06-05 04:17:23,134 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 04:17:23,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:17:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 04:17:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2240. [2021-06-05 04:17:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.935685573916927) internal successors, (6573), 2239 states have internal predecessors, (6573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 6573 transitions. [2021-06-05 04:17:23,158 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 6573 transitions. Word has length 21 [2021-06-05 04:17:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:23,158 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 6573 transitions. [2021-06-05 04:17:23,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 6573 transitions. [2021-06-05 04:17:23,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:23,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:23,160 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:23,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39662 [2021-06-05 04:17:23,360 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:23,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1059807780, now seen corresponding path program 356 times [2021-06-05 04:17:23,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:23,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642082885] [2021-06-05 04:17:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:23,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:23,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642082885] [2021-06-05 04:17:23,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642082885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:23,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770067786] [2021-06-05 04:17:23,415 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 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:23,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:23,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:23,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:23,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:23,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770067786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:23,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:23,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:23,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998077409] [2021-06-05 04:17:23,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:23,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:23,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:23,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:23,479 INFO L87 Difference]: Start difference. First operand 2240 states and 6573 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:23,660 INFO L93 Difference]: Finished difference Result 2711 states and 7663 transitions. [2021-06-05 04:17:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:23,661 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:23,663 INFO L225 Difference]: With dead ends: 2711 [2021-06-05 04:17:23,663 INFO L226 Difference]: Without dead ends: 2711 [2021-06-05 04:17:23,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:17:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-05 04:17:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 1587. [2021-06-05 04:17:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.91109709962169) internal successors, (4617), 1586 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4617 transitions. [2021-06-05 04:17:23,682 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4617 transitions. Word has length 21 [2021-06-05 04:17:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:23,682 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 4617 transitions. [2021-06-05 04:17:23,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:23,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4617 transitions. [2021-06-05 04:17:23,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:23,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:23,683 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:23,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39663,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:23,884 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:23,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:23,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1390653083, now seen corresponding path program 357 times [2021-06-05 04:17:23,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:23,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486439968] [2021-06-05 04:17:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:23,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:23,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486439968] [2021-06-05 04:17:23,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486439968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:23,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524690199] [2021-06-05 04:17:23,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:23,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:17:23,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:23,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:23,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:24,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524690199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:24,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:24,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:24,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831296392] [2021-06-05 04:17:24,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:24,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:24,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:24,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:24,014 INFO L87 Difference]: Start difference. First operand 1587 states and 4617 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:24,112 INFO L93 Difference]: Finished difference Result 2083 states and 5732 transitions. [2021-06-05 04:17:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:24,114 INFO L225 Difference]: With dead ends: 2083 [2021-06-05 04:17:24,114 INFO L226 Difference]: Without dead ends: 2069 [2021-06-05 04:17:24,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:17:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-05 04:17:24,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1608. [2021-06-05 04:17:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.8985687616677036) internal successors, (4658), 1607 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4658 transitions. [2021-06-05 04:17:24,131 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4658 transitions. Word has length 21 [2021-06-05 04:17:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:24,131 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4658 transitions. [2021-06-05 04:17:24,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4658 transitions. [2021-06-05 04:17:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:24,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:24,132 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:24,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39664,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:24,333 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:24,333 INFO L82 PathProgramCache]: Analyzing trace with hash 423340926, now seen corresponding path program 358 times [2021-06-05 04:17:24,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:24,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8751913] [2021-06-05 04:17:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:24,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:24,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8751913] [2021-06-05 04:17:24,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8751913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:24,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633684450] [2021-06-05 04:17:24,391 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:24,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:24,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:24,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:24,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:24,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633684450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:24,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:24,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:24,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964068337] [2021-06-05 04:17:24,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:24,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:24,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:24,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:24,455 INFO L87 Difference]: Start difference. First operand 1608 states and 4658 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:24,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:24,708 INFO L93 Difference]: Finished difference Result 2373 states and 6517 transitions. [2021-06-05 04:17:24,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:17:24,708 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:24,710 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 04:17:24,710 INFO L226 Difference]: Without dead ends: 2373 [2021-06-05 04:17:24,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:17:24,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-06-05 04:17:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1546. [2021-06-05 04:17:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.8944983818770225) internal successors, (4472), 1545 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 4472 transitions. [2021-06-05 04:17:24,729 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 4472 transitions. Word has length 21 [2021-06-05 04:17:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:24,729 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 4472 transitions. [2021-06-05 04:17:24,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 4472 transitions. [2021-06-05 04:17:24,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:24,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:24,730 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:24,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39665,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:24,931 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:24,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:24,931 INFO L82 PathProgramCache]: Analyzing trace with hash 180726139, now seen corresponding path program 359 times [2021-06-05 04:17:24,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:24,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673576795] [2021-06-05 04:17:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:24,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:24,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673576795] [2021-06-05 04:17:24,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673576795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:24,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729207915] [2021-06-05 04:17:24,974 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 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:24,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:24,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:24,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:24,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:25,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729207915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:25,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:25,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:17:25,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767668530] [2021-06-05 04:17:25,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:17:25,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:25,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:17:25,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:17:25,034 INFO L87 Difference]: Start difference. First operand 1546 states and 4472 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 04:17:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:25,098 INFO L93 Difference]: Finished difference Result 2113 states and 5765 transitions. [2021-06-05 04:17:25,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:17:25,098 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 04:17:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:25,100 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 04:17:25,100 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 04:17:25,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 04:17:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1736. [2021-06-05 04:17:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.936023054755043) internal successors, (5094), 1735 states have internal predecessors, (5094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 5094 transitions. [2021-06-05 04:17:25,117 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 5094 transitions. Word has length 21 [2021-06-05 04:17:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:25,117 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 5094 transitions. [2021-06-05 04:17:25,117 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 04:17:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 5094 transitions. [2021-06-05 04:17:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:25,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:25,119 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:25,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39666,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:25,319 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:25,320 INFO L82 PathProgramCache]: Analyzing trace with hash 261856424, now seen corresponding path program 360 times [2021-06-05 04:17:25,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:25,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088934822] [2021-06-05 04:17:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:25,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:25,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088934822] [2021-06-05 04:17:25,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088934822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:25,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640608413] [2021-06-05 04:17:25,360 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 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:25,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:17:25,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:25,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:25,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:25,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640608413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:25,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:25,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:17:25,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720618551] [2021-06-05 04:17:25,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:17:25,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:25,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:17:25,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:17:25,415 INFO L87 Difference]: Start difference. First operand 1736 states and 5094 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 04:17:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:25,547 INFO L93 Difference]: Finished difference Result 1970 states and 5495 transitions. [2021-06-05 04:17:25,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:25,547 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 04:17:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:25,549 INFO L225 Difference]: With dead ends: 1970 [2021-06-05 04:17:25,549 INFO L226 Difference]: Without dead ends: 1968 [2021-06-05 04:17:25,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:17:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-05 04:17:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1755. [2021-06-05 04:17:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 2.944127708095781) internal successors, (5164), 1754 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 04:17:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 5164 transitions. [2021-06-05 04:17:25,567 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 5164 transitions. Word has length 21 [2021-06-05 04:17:25,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:25,567 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 5164 transitions. [2021-06-05 04:17:25,567 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 04:17:25,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 5164 transitions. [2021-06-05 04:17:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:25,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:25,568 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:25,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39667,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:25,769 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1775453631, now seen corresponding path program 361 times [2021-06-05 04:17:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:25,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074470685] [2021-06-05 04:17:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:25,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:25,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074470685] [2021-06-05 04:17:25,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074470685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:25,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553734404] [2021-06-05 04:17:25,812 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 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:25,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:25,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:25,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553734404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:25,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:25,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:17:25,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211250346] [2021-06-05 04:17:25,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:17:25,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:25,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:17:25,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:17:25,866 INFO L87 Difference]: Start difference. First operand 1755 states and 5164 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 04:17:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:25,989 INFO L93 Difference]: Finished difference Result 2106 states and 5785 transitions. [2021-06-05 04:17:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:25,989 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 04:17:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:25,991 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 04:17:25,991 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 04:17:25,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:17:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 04:17:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1755. [2021-06-05 04:17:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 2.943557582668187) internal successors, (5163), 1754 states have internal predecessors, (5163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 5163 transitions. [2021-06-05 04:17:26,009 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 5163 transitions. Word has length 21 [2021-06-05 04:17:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:26,009 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 5163 transitions. [2021-06-05 04:17:26,010 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 04:17:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 5163 transitions. [2021-06-05 04:17:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:26,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:26,011 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:26,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39668 [2021-06-05 04:17:26,212 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:26,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:26,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1114189848, now seen corresponding path program 362 times [2021-06-05 04:17:26,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:26,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571070761] [2021-06-05 04:17:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:26,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:26,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571070761] [2021-06-05 04:17:26,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571070761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:26,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032140827] [2021-06-05 04:17:26,254 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 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:26,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:26,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:26,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:26,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:26,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032140827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:26,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:26,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:17:26,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591809725] [2021-06-05 04:17:26,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:17:26,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:26,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:17:26,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:17:26,311 INFO L87 Difference]: Start difference. First operand 1755 states and 5163 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 04:17:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:26,400 INFO L93 Difference]: Finished difference Result 2027 states and 5646 transitions. [2021-06-05 04:17:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:17:26,400 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 04:17:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:26,402 INFO L225 Difference]: With dead ends: 2027 [2021-06-05 04:17:26,402 INFO L226 Difference]: Without dead ends: 2027 [2021-06-05 04:17:26,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-05 04:17:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1735. [2021-06-05 04:17:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 2.9371395617070357) internal successors, (5093), 1734 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 5093 transitions. [2021-06-05 04:17:26,421 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 5093 transitions. Word has length 21 [2021-06-05 04:17:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:26,421 INFO L482 AbstractCegarLoop]: Abstraction has 1735 states and 5093 transitions. [2021-06-05 04:17:26,421 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 04:17:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 5093 transitions. [2021-06-05 04:17:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:26,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:26,423 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:26,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39669 [2021-06-05 04:17:26,623 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1875263, now seen corresponding path program 363 times [2021-06-05 04:17:26,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:26,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705859577] [2021-06-05 04:17:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:26,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:26,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705859577] [2021-06-05 04:17:26,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705859577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:26,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503982504] [2021-06-05 04:17:26,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:26,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:17:26,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:26,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:26,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:26,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503982504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:26,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:26,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:26,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142113461] [2021-06-05 04:17:26,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:26,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:26,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:26,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:26,740 INFO L87 Difference]: Start difference. First operand 1735 states and 5093 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:26,879 INFO L93 Difference]: Finished difference Result 2088 states and 5771 transitions. [2021-06-05 04:17:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:26,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:26,881 INFO L225 Difference]: With dead ends: 2088 [2021-06-05 04:17:26,881 INFO L226 Difference]: Without dead ends: 2078 [2021-06-05 04:17:26,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-06-05 04:17:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1761. [2021-06-05 04:17:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.947159090909091) internal successors, (5187), 1760 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 5187 transitions. [2021-06-05 04:17:26,899 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 5187 transitions. Word has length 21 [2021-06-05 04:17:26,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:26,899 INFO L482 AbstractCegarLoop]: Abstraction has 1761 states and 5187 transitions. [2021-06-05 04:17:26,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 5187 transitions. [2021-06-05 04:17:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:26,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:26,901 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:27,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39670,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:27,101 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:27,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:27,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1050203909, now seen corresponding path program 364 times [2021-06-05 04:17:27,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:27,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521995405] [2021-06-05 04:17:27,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:27,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:27,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521995405] [2021-06-05 04:17:27,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521995405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:27,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457366132] [2021-06-05 04:17:27,153 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 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:27,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:27,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:27,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:27,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:27,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457366132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:27,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:27,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:27,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952695713] [2021-06-05 04:17:27,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:27,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:27,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:27,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:27,214 INFO L87 Difference]: Start difference. First operand 1761 states and 5187 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:27,385 INFO L93 Difference]: Finished difference Result 2110 states and 5814 transitions. [2021-06-05 04:17:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:27,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:27,388 INFO L225 Difference]: With dead ends: 2110 [2021-06-05 04:17:27,388 INFO L226 Difference]: Without dead ends: 2102 [2021-06-05 04:17:27,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-06-05 04:17:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1765. [2021-06-05 04:17:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.945011337868481) internal successors, (5195), 1764 states have internal predecessors, (5195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5195 transitions. [2021-06-05 04:17:27,406 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5195 transitions. Word has length 21 [2021-06-05 04:17:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:27,406 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 5195 transitions. [2021-06-05 04:17:27,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5195 transitions. [2021-06-05 04:17:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:27,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:27,407 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:27,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39671 [2021-06-05 04:17:27,608 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:27,608 INFO L82 PathProgramCache]: Analyzing trace with hash -915160642, now seen corresponding path program 365 times [2021-06-05 04:17:27,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:27,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059418747] [2021-06-05 04:17:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:27,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:27,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059418747] [2021-06-05 04:17:27,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059418747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:27,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283848960] [2021-06-05 04:17:27,677 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:27,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:17:27,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:27,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:27,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283848960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:27,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:27,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:27,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479682389] [2021-06-05 04:17:27,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:27,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:27,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:27,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:27,751 INFO L87 Difference]: Start difference. First operand 1765 states and 5195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:27,863 INFO L93 Difference]: Finished difference Result 2026 states and 5698 transitions. [2021-06-05 04:17:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:17:27,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:27,865 INFO L225 Difference]: With dead ends: 2026 [2021-06-05 04:17:27,865 INFO L226 Difference]: Without dead ends: 2026 [2021-06-05 04:17:27,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-06-05 04:17:27,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1701. [2021-06-05 04:17:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.9376470588235293) internal successors, (4994), 1700 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4994 transitions. [2021-06-05 04:17:27,882 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4994 transitions. Word has length 21 [2021-06-05 04:17:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:27,882 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 4994 transitions. [2021-06-05 04:17:27,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4994 transitions. [2021-06-05 04:17:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:27,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:27,884 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:28,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39672 [2021-06-05 04:17:28,084 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash 695080127, now seen corresponding path program 366 times [2021-06-05 04:17:28,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:28,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486330652] [2021-06-05 04:17:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:28,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:28,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486330652] [2021-06-05 04:17:28,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486330652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:28,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904910082] [2021-06-05 04:17:28,137 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 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:28,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:17:28,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:28,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:28,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:28,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904910082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:28,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:28,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:28,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48009772] [2021-06-05 04:17:28,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:28,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:28,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:28,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:28,199 INFO L87 Difference]: Start difference. First operand 1701 states and 4994 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:28,340 INFO L93 Difference]: Finished difference Result 2422 states and 6653 transitions. [2021-06-05 04:17:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:17:28,340 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:28,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:28,342 INFO L225 Difference]: With dead ends: 2422 [2021-06-05 04:17:28,342 INFO L226 Difference]: Without dead ends: 2402 [2021-06-05 04:17:28,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:28,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-06-05 04:17:28,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1701. [2021-06-05 04:17:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.934705882352941) internal successors, (4989), 1700 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4989 transitions. [2021-06-05 04:17:28,361 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4989 transitions. Word has length 21 [2021-06-05 04:17:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:28,361 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 4989 transitions. [2021-06-05 04:17:28,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4989 transitions. [2021-06-05 04:17:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:28,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:28,363 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:28,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39673,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:28,563 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash 567974296, now seen corresponding path program 367 times [2021-06-05 04:17:28,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:28,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236088680] [2021-06-05 04:17:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:28,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:28,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236088680] [2021-06-05 04:17:28,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236088680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:28,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805230079] [2021-06-05 04:17:28,614 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 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:28,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:28,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:28,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805230079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:28,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:28,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:28,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116297802] [2021-06-05 04:17:28,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:28,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:28,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:28,678 INFO L87 Difference]: Start difference. First operand 1701 states and 4989 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:28,758 INFO L93 Difference]: Finished difference Result 2175 states and 6221 transitions. [2021-06-05 04:17:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:17:28,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:28,760 INFO L225 Difference]: With dead ends: 2175 [2021-06-05 04:17:28,760 INFO L226 Difference]: Without dead ends: 2175 [2021-06-05 04:17:28,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-06-05 04:17:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2028. [2021-06-05 04:17:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.938332511100148) internal successors, (5956), 2027 states have internal predecessors, (5956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5956 transitions. [2021-06-05 04:17:28,780 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5956 transitions. Word has length 21 [2021-06-05 04:17:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:28,780 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5956 transitions. [2021-06-05 04:17:28,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:28,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5956 transitions. [2021-06-05 04:17:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:28,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:28,781 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:28,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39674,376 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:28,982 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:28,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:28,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1035689605, now seen corresponding path program 368 times [2021-06-05 04:17:28,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:28,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681186887] [2021-06-05 04:17:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:29,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:29,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681186887] [2021-06-05 04:17:29,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681186887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:29,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211416945] [2021-06-05 04:17:29,044 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 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:29,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:29,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:29,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:29,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211416945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:29,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:29,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:29,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501364285] [2021-06-05 04:17:29,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:29,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:29,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:29,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:29,105 INFO L87 Difference]: Start difference. First operand 2028 states and 5956 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:29,266 INFO L93 Difference]: Finished difference Result 2740 states and 7631 transitions. [2021-06-05 04:17:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:29,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:29,268 INFO L225 Difference]: With dead ends: 2740 [2021-06-05 04:17:29,268 INFO L226 Difference]: Without dead ends: 2728 [2021-06-05 04:17:29,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-05 04:17:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2062. [2021-06-05 04:17:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.937894226103833) internal successors, (6055), 2061 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 6055 transitions. [2021-06-05 04:17:29,290 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 6055 transitions. Word has length 21 [2021-06-05 04:17:29,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:29,290 INFO L482 AbstractCegarLoop]: Abstraction has 2062 states and 6055 transitions. [2021-06-05 04:17:29,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:29,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 6055 transitions. [2021-06-05 04:17:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:29,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:29,292 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:29,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39675,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:29,492 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:29,493 INFO L82 PathProgramCache]: Analyzing trace with hash -699482882, now seen corresponding path program 369 times [2021-06-05 04:17:29,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:29,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031141063] [2021-06-05 04:17:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:29,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:29,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031141063] [2021-06-05 04:17:29,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031141063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:29,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59991831] [2021-06-05 04:17:29,550 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 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:29,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:17:29,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:29,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:29,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:29,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59991831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:29,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:29,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:29,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583208856] [2021-06-05 04:17:29,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:29,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:29,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:29,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:29,615 INFO L87 Difference]: Start difference. First operand 2062 states and 6055 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:29,779 INFO L93 Difference]: Finished difference Result 2298 states and 6476 transitions. [2021-06-05 04:17:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:17:29,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:29,781 INFO L225 Difference]: With dead ends: 2298 [2021-06-05 04:17:29,781 INFO L226 Difference]: Without dead ends: 2298 [2021-06-05 04:17:29,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-05 04:17:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2031. [2021-06-05 04:17:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.9369458128078816) internal successors, (5962), 2030 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5962 transitions. [2021-06-05 04:17:29,800 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5962 transitions. Word has length 21 [2021-06-05 04:17:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:29,800 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5962 transitions. [2021-06-05 04:17:29,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5962 transitions. [2021-06-05 04:17:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:29,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:29,802 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:30,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39676,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:30,003 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:30,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:30,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1145023551, now seen corresponding path program 370 times [2021-06-05 04:17:30,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:30,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793652838] [2021-06-05 04:17:30,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:30,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:30,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793652838] [2021-06-05 04:17:30,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793652838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:30,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056489701] [2021-06-05 04:17:30,067 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 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:30,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:30,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:30,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:30,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:30,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056489701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:30,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:30,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:30,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565619878] [2021-06-05 04:17:30,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:30,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:30,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:30,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:30,128 INFO L87 Difference]: Start difference. First operand 2031 states and 5962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:30,225 INFO L93 Difference]: Finished difference Result 2345 states and 6662 transitions. [2021-06-05 04:17:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:17:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:30,227 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 04:17:30,227 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 04:17:30,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:17:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 04:17:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2031. [2021-06-05 04:17:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.9364532019704432) internal successors, (5961), 2030 states have internal predecessors, (5961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5961 transitions. [2021-06-05 04:17:30,247 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5961 transitions. Word has length 21 [2021-06-05 04:17:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:30,247 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5961 transitions. [2021-06-05 04:17:30,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:30,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5961 transitions. [2021-06-05 04:17:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:30,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:30,249 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:30,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39677,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:30,453 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1335949736, now seen corresponding path program 371 times [2021-06-05 04:17:30,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:30,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767159292] [2021-06-05 04:17:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:30,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:30,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767159292] [2021-06-05 04:17:30,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767159292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:30,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482874690] [2021-06-05 04:17:30,514 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 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:30,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:17:30,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:30,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:30,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:30,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482874690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:30,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:30,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:30,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899196351] [2021-06-05 04:17:30,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:30,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:30,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:30,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:30,578 INFO L87 Difference]: Start difference. First operand 2031 states and 5961 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:30,777 INFO L93 Difference]: Finished difference Result 2359 states and 6653 transitions. [2021-06-05 04:17:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:17:30,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:30,779 INFO L225 Difference]: With dead ends: 2359 [2021-06-05 04:17:30,779 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 04:17:30,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:17:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 04:17:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2104. [2021-06-05 04:17:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.9381835473133617) internal successors, (6179), 2103 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 6179 transitions. [2021-06-05 04:17:30,800 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 6179 transitions. Word has length 21 [2021-06-05 04:17:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:30,800 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 6179 transitions. [2021-06-05 04:17:30,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 6179 transitions. [2021-06-05 04:17:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:30,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:30,802 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:31,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39678 [2021-06-05 04:17:31,003 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:31,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:31,007 INFO L82 PathProgramCache]: Analyzing trace with hash 27654651, now seen corresponding path program 372 times [2021-06-05 04:17:31,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:31,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741668758] [2021-06-05 04:17:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:31,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:31,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741668758] [2021-06-05 04:17:31,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741668758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:31,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899202133] [2021-06-05 04:17:31,078 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 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:31,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:17:31,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:31,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:31,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:31,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899202133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:31,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:31,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:31,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872849006] [2021-06-05 04:17:31,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:31,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:31,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:31,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:31,154 INFO L87 Difference]: Start difference. First operand 2104 states and 6179 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:31,240 INFO L93 Difference]: Finished difference Result 2399 states and 6834 transitions. [2021-06-05 04:17:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:31,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:31,243 INFO L225 Difference]: With dead ends: 2399 [2021-06-05 04:17:31,243 INFO L226 Difference]: Without dead ends: 2383 [2021-06-05 04:17:31,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-05 04:17:31,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2104. [2021-06-05 04:17:31,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.9377080361388495) internal successors, (6178), 2103 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 6178 transitions. [2021-06-05 04:17:31,266 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 6178 transitions. Word has length 21 [2021-06-05 04:17:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:31,266 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 6178 transitions. [2021-06-05 04:17:31,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 6178 transitions. [2021-06-05 04:17:31,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:31,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:31,268 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:31,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39679 [2021-06-05 04:17:31,468 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:31,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:31,469 INFO L82 PathProgramCache]: Analyzing trace with hash 408414270, now seen corresponding path program 373 times [2021-06-05 04:17:31,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:31,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745861825] [2021-06-05 04:17:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:31,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:31,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745861825] [2021-06-05 04:17:31,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745861825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:31,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068166813] [2021-06-05 04:17:31,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:31,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:31,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:31,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068166813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:31,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:31,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:31,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957510100] [2021-06-05 04:17:31,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:31,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:31,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:31,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:31,627 INFO L87 Difference]: Start difference. First operand 2104 states and 6178 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:31,877 INFO L93 Difference]: Finished difference Result 2543 states and 7159 transitions. [2021-06-05 04:17:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:17:31,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:31,880 INFO L225 Difference]: With dead ends: 2543 [2021-06-05 04:17:31,880 INFO L226 Difference]: Without dead ends: 2543 [2021-06-05 04:17:31,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:17:31,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-06-05 04:17:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2128. [2021-06-05 04:17:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.938410907381288) internal successors, (6250), 2127 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 6250 transitions. [2021-06-05 04:17:31,901 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 6250 transitions. Word has length 21 [2021-06-05 04:17:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:31,901 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 6250 transitions. [2021-06-05 04:17:31,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 6250 transitions. [2021-06-05 04:17:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:31,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:31,904 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:32,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39680,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:32,106 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:32,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:32,106 INFO L82 PathProgramCache]: Analyzing trace with hash -962719899, now seen corresponding path program 374 times [2021-06-05 04:17:32,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:32,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996207925] [2021-06-05 04:17:32,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:32,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:32,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996207925] [2021-06-05 04:17:32,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996207925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:32,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494589192] [2021-06-05 04:17:32,165 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 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:32,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:32,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:32,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:32,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494589192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:32,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:32,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:32,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246755956] [2021-06-05 04:17:32,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:32,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:32,227 INFO L87 Difference]: Start difference. First operand 2128 states and 6250 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:32,323 INFO L93 Difference]: Finished difference Result 2474 states and 6959 transitions. [2021-06-05 04:17:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:17:32,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:32,325 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 04:17:32,325 INFO L226 Difference]: Without dead ends: 2474 [2021-06-05 04:17:32,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-05 04:17:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2190. [2021-06-05 04:17:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 2.9520328917313843) internal successors, (6462), 2189 states have internal predecessors, (6462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 6462 transitions. [2021-06-05 04:17:32,347 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 6462 transitions. Word has length 21 [2021-06-05 04:17:32,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:32,347 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 6462 transitions. [2021-06-05 04:17:32,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:32,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 6462 transitions. [2021-06-05 04:17:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:32,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:32,349 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:32,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39681 [2021-06-05 04:17:32,549 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1552318936, now seen corresponding path program 375 times [2021-06-05 04:17:32,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:32,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904480940] [2021-06-05 04:17:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:32,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:32,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904480940] [2021-06-05 04:17:32,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904480940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:32,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983740073] [2021-06-05 04:17:32,618 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 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:32,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:32,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:32,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:32,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:32,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983740073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:32,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:32,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:32,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493740998] [2021-06-05 04:17:32,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:32,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:32,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:32,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:32,681 INFO L87 Difference]: Start difference. First operand 2190 states and 6462 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:32,889 INFO L93 Difference]: Finished difference Result 2504 states and 7007 transitions. [2021-06-05 04:17:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:32,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:32,892 INFO L225 Difference]: With dead ends: 2504 [2021-06-05 04:17:32,892 INFO L226 Difference]: Without dead ends: 2500 [2021-06-05 04:17:32,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-06-05 04:17:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2209. [2021-06-05 04:17:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.9556159420289854) internal successors, (6526), 2208 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 6526 transitions. [2021-06-05 04:17:32,915 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 6526 transitions. Word has length 21 [2021-06-05 04:17:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:32,915 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 6526 transitions. [2021-06-05 04:17:32,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 6526 transitions. [2021-06-05 04:17:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:32,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:32,917 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:33,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39682,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:33,117 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:33,117 INFO L82 PathProgramCache]: Analyzing trace with hash -576518785, now seen corresponding path program 376 times [2021-06-05 04:17:33,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:33,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470721387] [2021-06-05 04:17:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:33,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:33,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470721387] [2021-06-05 04:17:33,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470721387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:33,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173676435] [2021-06-05 04:17:33,170 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 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:33,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:33,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:33,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:33,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173676435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:33,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:33,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:33,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368857659] [2021-06-05 04:17:33,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:33,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:33,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:33,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:33,280 INFO L87 Difference]: Start difference. First operand 2209 states and 6526 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:33,402 INFO L93 Difference]: Finished difference Result 2434 states and 6886 transitions. [2021-06-05 04:17:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:33,404 INFO L225 Difference]: With dead ends: 2434 [2021-06-05 04:17:33,404 INFO L226 Difference]: Without dead ends: 2428 [2021-06-05 04:17:33,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-05 04:17:33,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2191. [2021-06-05 04:17:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 2.948401826484018) internal successors, (6457), 2190 states have internal predecessors, (6457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 6457 transitions. [2021-06-05 04:17:33,426 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 6457 transitions. Word has length 21 [2021-06-05 04:17:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:33,426 INFO L482 AbstractCegarLoop]: Abstraction has 2191 states and 6457 transitions. [2021-06-05 04:17:33,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 6457 transitions. [2021-06-05 04:17:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:33,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:33,428 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:33,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39683,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:33,629 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:33,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1237782568, now seen corresponding path program 377 times [2021-06-05 04:17:33,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:33,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838130600] [2021-06-05 04:17:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:33,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:33,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838130600] [2021-06-05 04:17:33,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838130600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:33,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431895798] [2021-06-05 04:17:33,690 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 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:33,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:33,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:33,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:33,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:33,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431895798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:33,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:33,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:33,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028648340] [2021-06-05 04:17:33,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:33,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:33,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:33,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:33,756 INFO L87 Difference]: Start difference. First operand 2191 states and 6457 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:33,831 INFO L93 Difference]: Finished difference Result 2597 states and 7234 transitions. [2021-06-05 04:17:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:17:33,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:33,834 INFO L225 Difference]: With dead ends: 2597 [2021-06-05 04:17:33,834 INFO L226 Difference]: Without dead ends: 2597 [2021-06-05 04:17:33,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-06-05 04:17:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2201. [2021-06-05 04:17:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.945909090909091) internal successors, (6481), 2200 states have internal predecessors, (6481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6481 transitions. [2021-06-05 04:17:33,857 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6481 transitions. Word has length 21 [2021-06-05 04:17:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:33,857 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6481 transitions. [2021-06-05 04:17:33,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6481 transitions. [2021-06-05 04:17:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:33,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:33,859 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:34,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39684,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:34,059 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:34,059 INFO L82 PathProgramCache]: Analyzing trace with hash 577001109, now seen corresponding path program 378 times [2021-06-05 04:17:34,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:34,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476720657] [2021-06-05 04:17:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:34,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:34,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476720657] [2021-06-05 04:17:34,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476720657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:34,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061304708] [2021-06-05 04:17:34,110 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 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:34,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:17:34,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:34,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:34,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:34,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061304708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:34,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:34,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:34,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064084776] [2021-06-05 04:17:34,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:34,165 INFO L87 Difference]: Start difference. First operand 2201 states and 6481 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:34,285 INFO L93 Difference]: Finished difference Result 2455 states and 6971 transitions. [2021-06-05 04:17:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:34,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:34,288 INFO L225 Difference]: With dead ends: 2455 [2021-06-05 04:17:34,288 INFO L226 Difference]: Without dead ends: 2449 [2021-06-05 04:17:34,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:34,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-06-05 04:17:34,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 2201. [2021-06-05 04:17:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.9454545454545453) internal successors, (6480), 2200 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6480 transitions. [2021-06-05 04:17:34,310 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6480 transitions. Word has length 21 [2021-06-05 04:17:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:34,310 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6480 transitions. [2021-06-05 04:17:34,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6480 transitions. [2021-06-05 04:17:34,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:34,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:34,312 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:34,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39685,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:34,513 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:34,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1534180504, now seen corresponding path program 379 times [2021-06-05 04:17:34,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:34,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343422042] [2021-06-05 04:17:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:34,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:34,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343422042] [2021-06-05 04:17:34,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343422042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:34,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545587537] [2021-06-05 04:17:34,587 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 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:34,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:34,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545587537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:34,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:34,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:34,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301945340] [2021-06-05 04:17:34,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:34,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:34,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:34,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:34,646 INFO L87 Difference]: Start difference. First operand 2201 states and 6480 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:34,728 INFO L93 Difference]: Finished difference Result 2588 states and 7244 transitions. [2021-06-05 04:17:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:17:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:34,730 INFO L225 Difference]: With dead ends: 2588 [2021-06-05 04:17:34,730 INFO L226 Difference]: Without dead ends: 2588 [2021-06-05 04:17:34,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-05 04:17:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2203. [2021-06-05 04:17:34,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.9436875567665757) internal successors, (6482), 2202 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6482 transitions. [2021-06-05 04:17:34,752 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6482 transitions. Word has length 21 [2021-06-05 04:17:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:34,753 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6482 transitions. [2021-06-05 04:17:34,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6482 transitions. [2021-06-05 04:17:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:34,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:34,754 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:34,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39686,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:34,955 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:34,955 INFO L82 PathProgramCache]: Analyzing trace with hash 148135359, now seen corresponding path program 380 times [2021-06-05 04:17:34,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:34,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601422946] [2021-06-05 04:17:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:35,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:35,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601422946] [2021-06-05 04:17:35,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601422946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:35,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487044555] [2021-06-05 04:17:35,020 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 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:35,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:35,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:35,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:35,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:35,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487044555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:35,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:35,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:35,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994405706] [2021-06-05 04:17:35,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:35,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:35,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:35,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:35,081 INFO L87 Difference]: Start difference. First operand 2203 states and 6482 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:35,212 INFO L93 Difference]: Finished difference Result 2575 states and 7311 transitions. [2021-06-05 04:17:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:17:35,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:35,215 INFO L225 Difference]: With dead ends: 2575 [2021-06-05 04:17:35,215 INFO L226 Difference]: Without dead ends: 2561 [2021-06-05 04:17:35,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:17:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-06-05 04:17:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2203. [2021-06-05 04:17:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.9432334241598546) internal successors, (6481), 2202 states have internal predecessors, (6481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6481 transitions. [2021-06-05 04:17:35,238 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6481 transitions. Word has length 21 [2021-06-05 04:17:35,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:35,238 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6481 transitions. [2021-06-05 04:17:35,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6481 transitions. [2021-06-05 04:17:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:35,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:35,240 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:35,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39687,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:35,440 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:35,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1962129368, now seen corresponding path program 381 times [2021-06-05 04:17:35,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:35,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615981799] [2021-06-05 04:17:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:35,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:35,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615981799] [2021-06-05 04:17:35,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615981799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:35,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306600768] [2021-06-05 04:17:35,507 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 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:35,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:35,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:35,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:35,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:35,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306600768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:35,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:35,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:35,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591720170] [2021-06-05 04:17:35,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:35,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:35,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:35,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:35,584 INFO L87 Difference]: Start difference. First operand 2203 states and 6481 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:35,814 INFO L93 Difference]: Finished difference Result 2783 states and 7906 transitions. [2021-06-05 04:17:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:35,815 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:35,817 INFO L225 Difference]: With dead ends: 2783 [2021-06-05 04:17:35,817 INFO L226 Difference]: Without dead ends: 2783 [2021-06-05 04:17:35,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:17:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-05 04:17:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2246. [2021-06-05 04:17:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 2.9469933184855233) internal successors, (6616), 2245 states have internal predecessors, (6616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 6616 transitions. [2021-06-05 04:17:35,841 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 6616 transitions. Word has length 21 [2021-06-05 04:17:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:35,841 INFO L482 AbstractCegarLoop]: Abstraction has 2246 states and 6616 transitions. [2021-06-05 04:17:35,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 6616 transitions. [2021-06-05 04:17:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:35,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:35,843 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:36,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39688 [2021-06-05 04:17:36,043 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:36,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1611155303, now seen corresponding path program 382 times [2021-06-05 04:17:36,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:36,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616761056] [2021-06-05 04:17:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:36,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:36,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616761056] [2021-06-05 04:17:36,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616761056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:36,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916737084] [2021-06-05 04:17:36,101 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 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:36,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:36,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:36,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:36,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916737084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:36,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:36,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:36,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803026631] [2021-06-05 04:17:36,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:36,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:36,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:36,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:36,161 INFO L87 Difference]: Start difference. First operand 2246 states and 6616 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:36,318 INFO L93 Difference]: Finished difference Result 2809 states and 7847 transitions. [2021-06-05 04:17:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:36,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:36,322 INFO L225 Difference]: With dead ends: 2809 [2021-06-05 04:17:36,322 INFO L226 Difference]: Without dead ends: 2795 [2021-06-05 04:17:36,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:17:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-06-05 04:17:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2250. [2021-06-05 04:17:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 2.94619831036016) internal successors, (6626), 2249 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 6626 transitions. [2021-06-05 04:17:36,349 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 6626 transitions. Word has length 21 [2021-06-05 04:17:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:36,349 INFO L482 AbstractCegarLoop]: Abstraction has 2250 states and 6626 transitions. [2021-06-05 04:17:36,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 6626 transitions. [2021-06-05 04:17:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:36,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:36,351 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:36,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39689 [2021-06-05 04:17:36,551 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:36,552 INFO L82 PathProgramCache]: Analyzing trace with hash 202838706, now seen corresponding path program 383 times [2021-06-05 04:17:36,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:36,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231097704] [2021-06-05 04:17:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:36,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:36,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231097704] [2021-06-05 04:17:36,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231097704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:36,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567525942] [2021-06-05 04:17:36,614 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 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:36,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:36,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:36,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:36,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:36,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567525942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:36,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:36,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:36,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073824472] [2021-06-05 04:17:36,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:36,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:36,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:36,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:36,680 INFO L87 Difference]: Start difference. First operand 2250 states and 6626 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:36,870 INFO L93 Difference]: Finished difference Result 2507 states and 7160 transitions. [2021-06-05 04:17:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:36,873 INFO L225 Difference]: With dead ends: 2507 [2021-06-05 04:17:36,873 INFO L226 Difference]: Without dead ends: 2507 [2021-06-05 04:17:36,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:17:36,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-05 04:17:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2256. [2021-06-05 04:17:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.946341463414634) internal successors, (6644), 2255 states have internal predecessors, (6644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6644 transitions. [2021-06-05 04:17:36,895 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6644 transitions. Word has length 21 [2021-06-05 04:17:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:36,895 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6644 transitions. [2021-06-05 04:17:36,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6644 transitions. [2021-06-05 04:17:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:36,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:36,897 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:37,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39690 [2021-06-05 04:17:37,098 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:37,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1566443093, now seen corresponding path program 384 times [2021-06-05 04:17:37,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:37,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725542078] [2021-06-05 04:17:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:37,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:37,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725542078] [2021-06-05 04:17:37,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725542078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:37,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313614676] [2021-06-05 04:17:37,159 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 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:37,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:17:37,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:37,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:37,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:37,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313614676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:37,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:37,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:37,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487619063] [2021-06-05 04:17:37,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:37,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:37,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:37,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:37,221 INFO L87 Difference]: Start difference. First operand 2256 states and 6644 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:37,294 INFO L93 Difference]: Finished difference Result 2564 states and 7327 transitions. [2021-06-05 04:17:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:17:37,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:37,297 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 04:17:37,297 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 04:17:37,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:37,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 04:17:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2256. [2021-06-05 04:17:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.9458980044345897) internal successors, (6643), 2255 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6643 transitions. [2021-06-05 04:17:37,319 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6643 transitions. Word has length 21 [2021-06-05 04:17:37,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:37,319 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6643 transitions. [2021-06-05 04:17:37,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6643 transitions. [2021-06-05 04:17:37,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:37,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:37,320 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:37,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39691,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:37,521 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1947202712, now seen corresponding path program 385 times [2021-06-05 04:17:37,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:37,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698280138] [2021-06-05 04:17:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:37,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:37,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698280138] [2021-06-05 04:17:37,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698280138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:37,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110146914] [2021-06-05 04:17:37,588 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 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:37,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:37,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110146914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:37,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:37,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:37,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580945905] [2021-06-05 04:17:37,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:37,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:37,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:37,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:37,652 INFO L87 Difference]: Start difference. First operand 2256 states and 6643 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:37,878 INFO L93 Difference]: Finished difference Result 2604 states and 7425 transitions. [2021-06-05 04:17:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:17:37,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:37,881 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 04:17:37,881 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 04:17:37,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=384, Invalid=738, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:17:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 04:17:37,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2270. [2021-06-05 04:17:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 2.9457910973997357) internal successors, (6684), 2269 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 6684 transitions. [2021-06-05 04:17:37,904 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 6684 transitions. Word has length 21 [2021-06-05 04:17:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:37,904 INFO L482 AbstractCegarLoop]: Abstraction has 2270 states and 6684 transitions. [2021-06-05 04:17:37,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 6684 transitions. [2021-06-05 04:17:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:37,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:37,906 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:38,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39692,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:38,106 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:38,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:38,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1278888389, now seen corresponding path program 386 times [2021-06-05 04:17:38,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:38,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42287658] [2021-06-05 04:17:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:38,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:38,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42287658] [2021-06-05 04:17:38,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42287658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:38,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806127752] [2021-06-05 04:17:38,152 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 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:38,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:38,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:38,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:38,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:38,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806127752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:38,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:38,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:38,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610115304] [2021-06-05 04:17:38,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:38,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:38,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:38,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:38,210 INFO L87 Difference]: Start difference. First operand 2270 states and 6684 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:38,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:38,282 INFO L93 Difference]: Finished difference Result 2879 states and 8100 transitions. [2021-06-05 04:17:38,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:17:38,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:38,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:38,285 INFO L225 Difference]: With dead ends: 2879 [2021-06-05 04:17:38,285 INFO L226 Difference]: Without dead ends: 2879 [2021-06-05 04:17:38,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-06-05 04:17:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2519. [2021-06-05 04:17:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 2.9785544082605244) internal successors, (7500), 2518 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7500 transitions. [2021-06-05 04:17:38,311 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7500 transitions. Word has length 21 [2021-06-05 04:17:38,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:38,311 INFO L482 AbstractCegarLoop]: Abstraction has 2519 states and 7500 transitions. [2021-06-05 04:17:38,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7500 transitions. [2021-06-05 04:17:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:38,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:38,313 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:38,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39693,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:38,513 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:38,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:38,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1197758104, now seen corresponding path program 387 times [2021-06-05 04:17:38,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:38,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960029143] [2021-06-05 04:17:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:38,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:38,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960029143] [2021-06-05 04:17:38,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960029143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:38,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348068481] [2021-06-05 04:17:38,563 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 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:38,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:17:38,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:38,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:38,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:38,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348068481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:38,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:38,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:38,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596575165] [2021-06-05 04:17:38,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:38,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:38,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:38,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:38,620 INFO L87 Difference]: Start difference. First operand 2519 states and 7500 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:38,775 INFO L93 Difference]: Finished difference Result 2785 states and 7952 transitions. [2021-06-05 04:17:38,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:38,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:38,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:38,777 INFO L225 Difference]: With dead ends: 2785 [2021-06-05 04:17:38,778 INFO L226 Difference]: Without dead ends: 2783 [2021-06-05 04:17:38,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-05 04:17:38,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2541. [2021-06-05 04:17:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 2.984645669291339) internal successors, (7581), 2540 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 7581 transitions. [2021-06-05 04:17:38,803 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 7581 transitions. Word has length 21 [2021-06-05 04:17:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:38,803 INFO L482 AbstractCegarLoop]: Abstraction has 2541 states and 7581 transitions. [2021-06-05 04:17:38,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 7581 transitions. [2021-06-05 04:17:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:38,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:38,805 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:39,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39694,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:39,006 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash 315839103, now seen corresponding path program 388 times [2021-06-05 04:17:39,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:39,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158951784] [2021-06-05 04:17:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:39,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:39,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158951784] [2021-06-05 04:17:39,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158951784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:39,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018394260] [2021-06-05 04:17:39,052 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 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:39,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:39,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:39,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:39,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:39,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018394260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:39,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:39,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:39,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544064352] [2021-06-05 04:17:39,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:39,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:39,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:39,106 INFO L87 Difference]: Start difference. First operand 2541 states and 7581 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:39,248 INFO L93 Difference]: Finished difference Result 2878 states and 8139 transitions. [2021-06-05 04:17:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:39,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:39,251 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 04:17:39,251 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 04:17:39,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 04:17:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2523. [2021-06-05 04:17:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 2.978191911181602) internal successors, (7511), 2522 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 7511 transitions. [2021-06-05 04:17:39,278 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 7511 transitions. Word has length 21 [2021-06-05 04:17:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:39,279 INFO L482 AbstractCegarLoop]: Abstraction has 2523 states and 7511 transitions. [2021-06-05 04:17:39,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 7511 transitions. [2021-06-05 04:17:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:39,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:39,281 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:39,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39695 [2021-06-05 04:17:39,481 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash -345424680, now seen corresponding path program 389 times [2021-06-05 04:17:39,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:39,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847337619] [2021-06-05 04:17:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:39,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:39,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847337619] [2021-06-05 04:17:39,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847337619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:39,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884052404] [2021-06-05 04:17:39,532 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 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:39,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:17:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:39,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:39,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:39,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884052404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:39,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:39,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:39,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862502067] [2021-06-05 04:17:39,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:39,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:39,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:39,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:39,592 INFO L87 Difference]: Start difference. First operand 2523 states and 7511 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:39,691 INFO L93 Difference]: Finished difference Result 2854 states and 8107 transitions. [2021-06-05 04:17:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:17:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:39,694 INFO L225 Difference]: With dead ends: 2854 [2021-06-05 04:17:39,694 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 04:17:39,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 04:17:39,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2529. [2021-06-05 04:17:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.978243670886076) internal successors, (7529), 2528 states have internal predecessors, (7529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 7529 transitions. [2021-06-05 04:17:39,720 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 7529 transitions. Word has length 21 [2021-06-05 04:17:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:39,720 INFO L482 AbstractCegarLoop]: Abstraction has 2529 states and 7529 transitions. [2021-06-05 04:17:39,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 7529 transitions. [2021-06-05 04:17:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:39,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:39,722 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:39,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39696,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:39,923 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash 931503419, now seen corresponding path program 390 times [2021-06-05 04:17:39,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:39,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705743248] [2021-06-05 04:17:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:39,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:39,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705743248] [2021-06-05 04:17:39,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705743248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:39,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650161326] [2021-06-05 04:17:39,970 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 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:39,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:17:39,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:39,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:39,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:40,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650161326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:40,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:40,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:40,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979705315] [2021-06-05 04:17:40,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:40,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:40,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:40,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:40,025 INFO L87 Difference]: Start difference. First operand 2529 states and 7529 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:40,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:40,160 INFO L93 Difference]: Finished difference Result 2971 states and 8408 transitions. [2021-06-05 04:17:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:40,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:40,164 INFO L225 Difference]: With dead ends: 2971 [2021-06-05 04:17:40,164 INFO L226 Difference]: Without dead ends: 2967 [2021-06-05 04:17:40,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:40,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-06-05 04:17:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2529. [2021-06-05 04:17:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.9778481012658227) internal successors, (7528), 2528 states have internal predecessors, (7528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 7528 transitions. [2021-06-05 04:17:40,192 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 7528 transitions. Word has length 21 [2021-06-05 04:17:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:40,192 INFO L482 AbstractCegarLoop]: Abstraction has 2529 states and 7528 transitions. [2021-06-05 04:17:40,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:40,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 7528 transitions. [2021-06-05 04:17:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:40,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:40,194 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:40,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39697,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:40,395 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:40,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:40,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1888682814, now seen corresponding path program 391 times [2021-06-05 04:17:40,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:40,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672136516] [2021-06-05 04:17:40,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:40,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:40,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672136516] [2021-06-05 04:17:40,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672136516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:40,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478787873] [2021-06-05 04:17:40,446 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 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:40,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:40,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478787873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:40,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:40,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:40,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311871773] [2021-06-05 04:17:40,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:40,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:40,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:40,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:40,504 INFO L87 Difference]: Start difference. First operand 2529 states and 7528 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:40,640 INFO L93 Difference]: Finished difference Result 2883 states and 8203 transitions. [2021-06-05 04:17:40,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:17:40,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:40,643 INFO L225 Difference]: With dead ends: 2883 [2021-06-05 04:17:40,643 INFO L226 Difference]: Without dead ends: 2883 [2021-06-05 04:17:40,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:17:40,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-06-05 04:17:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2549. [2021-06-05 04:17:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2548 states have (on average 2.9803767660910516) internal successors, (7594), 2548 states have internal predecessors, (7594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 7594 transitions. [2021-06-05 04:17:40,668 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 7594 transitions. Word has length 21 [2021-06-05 04:17:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:40,668 INFO L482 AbstractCegarLoop]: Abstraction has 2549 states and 7594 transitions. [2021-06-05 04:17:40,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 7594 transitions. [2021-06-05 04:17:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:40,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:40,670 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:40,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39698,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:40,871 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:40,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:40,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1457739265, now seen corresponding path program 392 times [2021-06-05 04:17:40,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:40,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867151697] [2021-06-05 04:17:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:40,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:40,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867151697] [2021-06-05 04:17:40,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867151697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:40,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226036644] [2021-06-05 04:17:40,916 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 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:40,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:40,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:40,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:40,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:40,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226036644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:40,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:40,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:40,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035315270] [2021-06-05 04:17:40,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:40,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:40,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:40,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:40,970 INFO L87 Difference]: Start difference. First operand 2549 states and 7594 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:41,094 INFO L93 Difference]: Finished difference Result 2952 states and 8363 transitions. [2021-06-05 04:17:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:41,097 INFO L225 Difference]: With dead ends: 2952 [2021-06-05 04:17:41,097 INFO L226 Difference]: Without dead ends: 2946 [2021-06-05 04:17:41,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-06-05 04:17:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2549. [2021-06-05 04:17:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2548 states have (on average 2.979984301412873) internal successors, (7593), 2548 states have internal predecessors, (7593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 7593 transitions. [2021-06-05 04:17:41,122 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 7593 transitions. Word has length 21 [2021-06-05 04:17:41,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:41,122 INFO L482 AbstractCegarLoop]: Abstraction has 2549 states and 7593 transitions. [2021-06-05 04:17:41,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 7593 transitions. [2021-06-05 04:17:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:41,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:41,125 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:41,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39699,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:41,325 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:41,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1785148859, now seen corresponding path program 393 times [2021-06-05 04:17:41,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:41,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724859699] [2021-06-05 04:17:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:41,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:41,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724859699] [2021-06-05 04:17:41,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724859699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:41,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217708944] [2021-06-05 04:17:41,371 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 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:41,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:17:41,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:41,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:41,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217708944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:41,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:41,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:41,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172650885] [2021-06-05 04:17:41,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:41,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:41,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:41,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:41,432 INFO L87 Difference]: Start difference. First operand 2549 states and 7593 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:41,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:41,568 INFO L93 Difference]: Finished difference Result 2990 states and 8433 transitions. [2021-06-05 04:17:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:41,571 INFO L225 Difference]: With dead ends: 2990 [2021-06-05 04:17:41,571 INFO L226 Difference]: Without dead ends: 2982 [2021-06-05 04:17:41,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-06-05 04:17:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2581. [2021-06-05 04:17:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2580 states have (on average 2.9864341085271318) internal successors, (7705), 2580 states have internal predecessors, (7705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 7705 transitions. [2021-06-05 04:17:41,596 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 7705 transitions. Word has length 21 [2021-06-05 04:17:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:41,596 INFO L482 AbstractCegarLoop]: Abstraction has 2581 states and 7705 transitions. [2021-06-05 04:17:41,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 7705 transitions. [2021-06-05 04:17:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:41,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:41,598 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:41,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39700 [2021-06-05 04:17:41,799 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:41,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:41,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1920192126, now seen corresponding path program 394 times [2021-06-05 04:17:41,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:41,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962302860] [2021-06-05 04:17:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:41,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:41,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962302860] [2021-06-05 04:17:41,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962302860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:41,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204494596] [2021-06-05 04:17:41,850 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 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:41,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:41,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:41,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:41,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204494596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:41,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:41,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:41,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816305007] [2021-06-05 04:17:41,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:41,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:41,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:41,914 INFO L87 Difference]: Start difference. First operand 2581 states and 7705 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:42,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:42,066 INFO L93 Difference]: Finished difference Result 2910 states and 8395 transitions. [2021-06-05 04:17:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:42,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:42,069 INFO L225 Difference]: With dead ends: 2910 [2021-06-05 04:17:42,069 INFO L226 Difference]: Without dead ends: 2910 [2021-06-05 04:17:42,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-06-05 04:17:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2663. [2021-06-05 04:17:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 2.989105935386927) internal successors, (7957), 2662 states have internal predecessors, (7957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 7957 transitions. [2021-06-05 04:17:42,095 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 7957 transitions. Word has length 21 [2021-06-05 04:17:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:42,095 INFO L482 AbstractCegarLoop]: Abstraction has 2663 states and 7957 transitions. [2021-06-05 04:17:42,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 7957 transitions. [2021-06-05 04:17:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:42,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:42,097 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:42,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39701,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:42,298 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:42,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:42,298 INFO L82 PathProgramCache]: Analyzing trace with hash -764534401, now seen corresponding path program 395 times [2021-06-05 04:17:42,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:42,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817728893] [2021-06-05 04:17:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:42,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:42,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817728893] [2021-06-05 04:17:42,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817728893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:42,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005659313] [2021-06-05 04:17:42,346 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 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:42,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:17:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:42,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:42,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:42,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005659313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:42,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:42,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:42,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809480584] [2021-06-05 04:17:42,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:42,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:42,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:42,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:42,405 INFO L87 Difference]: Start difference. First operand 2663 states and 7957 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:42,542 INFO L93 Difference]: Finished difference Result 3615 states and 10212 transitions. [2021-06-05 04:17:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:42,546 INFO L225 Difference]: With dead ends: 3615 [2021-06-05 04:17:42,546 INFO L226 Difference]: Without dead ends: 3605 [2021-06-05 04:17:42,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-06-05 04:17:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2661. [2021-06-05 04:17:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 2.9890977443609024) internal successors, (7951), 2660 states have internal predecessors, (7951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 7951 transitions. [2021-06-05 04:17:42,575 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 7951 transitions. Word has length 21 [2021-06-05 04:17:42,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:42,575 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 7951 transitions. [2021-06-05 04:17:42,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 7951 transitions. [2021-06-05 04:17:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:42,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:42,578 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:42,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39702 [2021-06-05 04:17:42,778 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:42,778 INFO L82 PathProgramCache]: Analyzing trace with hash -891640232, now seen corresponding path program 396 times [2021-06-05 04:17:42,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:42,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398434242] [2021-06-05 04:17:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:42,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:42,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398434242] [2021-06-05 04:17:42,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398434242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:42,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799496568] [2021-06-05 04:17:42,829 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 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:42,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:17:42,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:42,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:42,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:42,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799496568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:42,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:42,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:42,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213492288] [2021-06-05 04:17:42,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:42,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:42,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:42,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:42,892 INFO L87 Difference]: Start difference. First operand 2661 states and 7951 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:43,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:43,020 INFO L93 Difference]: Finished difference Result 3050 states and 8892 transitions. [2021-06-05 04:17:43,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:17:43,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:43,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:43,023 INFO L225 Difference]: With dead ends: 3050 [2021-06-05 04:17:43,023 INFO L226 Difference]: Without dead ends: 3050 [2021-06-05 04:17:43,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:43,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2021-06-05 04:17:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 2842. [2021-06-05 04:17:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9922562478000705) internal successors, (8501), 2841 states have internal predecessors, (8501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8501 transitions. [2021-06-05 04:17:43,051 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8501 transitions. Word has length 21 [2021-06-05 04:17:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:43,051 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 8501 transitions. [2021-06-05 04:17:43,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8501 transitions. [2021-06-05 04:17:43,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:43,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:43,053 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:43,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39703 [2021-06-05 04:17:43,254 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:43,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1799663163, now seen corresponding path program 397 times [2021-06-05 04:17:43,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:43,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190639300] [2021-06-05 04:17:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:43,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:43,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190639300] [2021-06-05 04:17:43,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190639300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:43,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359000104] [2021-06-05 04:17:43,304 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 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:43,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:43,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:43,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359000104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:43,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:43,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:43,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221132872] [2021-06-05 04:17:43,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:43,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:43,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:43,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:43,363 INFO L87 Difference]: Start difference. First operand 2842 states and 8501 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:43,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:43,494 INFO L93 Difference]: Finished difference Result 3614 states and 10275 transitions. [2021-06-05 04:17:43,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:17:43,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:43,497 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 04:17:43,498 INFO L226 Difference]: Without dead ends: 3602 [2021-06-05 04:17:43,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3602 states. [2021-06-05 04:17:43,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3602 to 2842. [2021-06-05 04:17:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9915522703273494) internal successors, (8499), 2841 states have internal predecessors, (8499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8499 transitions. [2021-06-05 04:17:43,529 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8499 transitions. Word has length 21 [2021-06-05 04:17:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:43,529 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 8499 transitions. [2021-06-05 04:17:43,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8499 transitions. [2021-06-05 04:17:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:43,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:43,532 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:43,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39704 [2021-06-05 04:17:43,732 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:43,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:43,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2135869886, now seen corresponding path program 398 times [2021-06-05 04:17:43,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:43,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803092978] [2021-06-05 04:17:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:43,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:43,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803092978] [2021-06-05 04:17:43,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803092978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:43,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464221539] [2021-06-05 04:17:43,785 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 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:43,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:43,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:43,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:43,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:43,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464221539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:43,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:43,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:17:43,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770302165] [2021-06-05 04:17:43,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:43,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:43,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:43,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:43,847 INFO L87 Difference]: Start difference. First operand 2842 states and 8499 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:43,933 INFO L93 Difference]: Finished difference Result 2996 states and 8829 transitions. [2021-06-05 04:17:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:17:43,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:43,936 INFO L225 Difference]: With dead ends: 2996 [2021-06-05 04:17:43,936 INFO L226 Difference]: Without dead ends: 2996 [2021-06-05 04:17:43,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:17:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2021-06-05 04:17:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2879. [2021-06-05 04:17:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.991660875608061) internal successors, (8610), 2878 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 8610 transitions. [2021-06-05 04:17:43,964 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 8610 transitions. Word has length 21 [2021-06-05 04:17:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:43,964 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 8610 transitions. [2021-06-05 04:17:43,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 8610 transitions. [2021-06-05 04:17:43,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:43,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:43,966 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:44,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39705 [2021-06-05 04:17:44,167 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:44,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash -314590977, now seen corresponding path program 399 times [2021-06-05 04:17:44,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:44,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702729993] [2021-06-05 04:17:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:44,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:44,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702729993] [2021-06-05 04:17:44,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702729993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:44,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451647313] [2021-06-05 04:17:44,226 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 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:44,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:17:44,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:44,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:44,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451647313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:44,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:44,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:44,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298860523] [2021-06-05 04:17:44,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:44,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:44,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:44,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:44,293 INFO L87 Difference]: Start difference. First operand 2879 states and 8610 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:44,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:44,440 INFO L93 Difference]: Finished difference Result 3624 states and 10338 transitions. [2021-06-05 04:17:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:44,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:44,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:44,444 INFO L225 Difference]: With dead ends: 3624 [2021-06-05 04:17:44,444 INFO L226 Difference]: Without dead ends: 3610 [2021-06-05 04:17:44,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-06-05 04:17:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2900. [2021-06-05 04:17:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 2.9913763366678165) internal successors, (8672), 2899 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 8672 transitions. [2021-06-05 04:17:44,475 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 8672 transitions. Word has length 21 [2021-06-05 04:17:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:44,475 INFO L482 AbstractCegarLoop]: Abstraction has 2900 states and 8672 transitions. [2021-06-05 04:17:44,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:44,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 8672 transitions. [2021-06-05 04:17:44,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:44,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:44,478 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:44,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39706,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:44,678 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:44,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:44,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1499403032, now seen corresponding path program 400 times [2021-06-05 04:17:44,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:44,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346189557] [2021-06-05 04:17:44,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:44,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:44,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346189557] [2021-06-05 04:17:44,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346189557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:44,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631124846] [2021-06-05 04:17:44,739 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 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:44,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:44,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:44,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:44,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:44,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631124846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:44,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:44,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:44,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25259487] [2021-06-05 04:17:44,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:44,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:44,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:44,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:44,801 INFO L87 Difference]: Start difference. First operand 2900 states and 8672 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:44,942 INFO L93 Difference]: Finished difference Result 3081 states and 9020 transitions. [2021-06-05 04:17:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:17:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:44,945 INFO L225 Difference]: With dead ends: 3081 [2021-06-05 04:17:44,945 INFO L226 Difference]: Without dead ends: 3081 [2021-06-05 04:17:44,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:44,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-06-05 04:17:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 2899. [2021-06-05 04:17:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 2.9913733609385784) internal successors, (8669), 2898 states have internal predecessors, (8669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 8669 transitions. [2021-06-05 04:17:44,972 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 8669 transitions. Word has length 21 [2021-06-05 04:17:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:44,973 INFO L482 AbstractCegarLoop]: Abstraction has 2899 states and 8669 transitions. [2021-06-05 04:17:44,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 8669 transitions. [2021-06-05 04:17:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:44,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:44,975 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:45,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39707 [2021-06-05 04:17:45,175 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:45,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:45,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1431959877, now seen corresponding path program 401 times [2021-06-05 04:17:45,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:45,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369392945] [2021-06-05 04:17:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:45,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:45,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369392945] [2021-06-05 04:17:45,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369392945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:45,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841927190] [2021-06-05 04:17:45,239 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 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:45,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:17:45,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:45,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:45,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:45,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841927190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:45,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:45,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:45,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863525566] [2021-06-05 04:17:45,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:45,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:45,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:45,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:45,300 INFO L87 Difference]: Start difference. First operand 2899 states and 8669 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:45,382 INFO L93 Difference]: Finished difference Result 3250 states and 9452 transitions. [2021-06-05 04:17:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:17:45,382 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:45,385 INFO L225 Difference]: With dead ends: 3250 [2021-06-05 04:17:45,385 INFO L226 Difference]: Without dead ends: 3234 [2021-06-05 04:17:45,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-06-05 04:17:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2899. [2021-06-05 04:17:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 2.9910282953761214) internal successors, (8668), 2898 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 8668 transitions. [2021-06-05 04:17:45,415 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 8668 transitions. Word has length 21 [2021-06-05 04:17:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:45,415 INFO L482 AbstractCegarLoop]: Abstraction has 2899 states and 8668 transitions. [2021-06-05 04:17:45,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 8668 transitions. [2021-06-05 04:17:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:45,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:45,417 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:45,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39708,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:45,618 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:45,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:45,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1051200258, now seen corresponding path program 402 times [2021-06-05 04:17:45,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:45,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556340684] [2021-06-05 04:17:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:45,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:45,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556340684] [2021-06-05 04:17:45,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556340684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:45,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933885711] [2021-06-05 04:17:45,683 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 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:45,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:17:45,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:45,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:45,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:45,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933885711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:45,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:45,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:45,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945011589] [2021-06-05 04:17:45,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:45,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:45,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:45,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:45,749 INFO L87 Difference]: Start difference. First operand 2899 states and 8668 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:45,930 INFO L93 Difference]: Finished difference Result 3186 states and 9298 transitions. [2021-06-05 04:17:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:45,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:45,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:45,933 INFO L225 Difference]: With dead ends: 3186 [2021-06-05 04:17:45,933 INFO L226 Difference]: Without dead ends: 3186 [2021-06-05 04:17:45,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:17:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-06-05 04:17:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2911. [2021-06-05 04:17:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 2.99106529209622) internal successors, (8704), 2910 states have internal predecessors, (8704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 8704 transitions. [2021-06-05 04:17:45,962 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 8704 transitions. Word has length 21 [2021-06-05 04:17:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:45,962 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 8704 transitions. [2021-06-05 04:17:45,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 8704 transitions. [2021-06-05 04:17:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:45,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:45,964 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:46,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39709,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:46,165 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:46,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1710657409, now seen corresponding path program 403 times [2021-06-05 04:17:46,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:46,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199569964] [2021-06-05 04:17:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:46,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:46,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199569964] [2021-06-05 04:17:46,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199569964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:46,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309124543] [2021-06-05 04:17:46,232 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 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:46,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:46,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309124543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:46,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:46,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:46,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902338503] [2021-06-05 04:17:46,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:46,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:46,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:46,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:46,293 INFO L87 Difference]: Start difference. First operand 2911 states and 8704 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:46,369 INFO L93 Difference]: Finished difference Result 3241 states and 9439 transitions. [2021-06-05 04:17:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:46,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:46,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:46,372 INFO L225 Difference]: With dead ends: 3241 [2021-06-05 04:17:46,372 INFO L226 Difference]: Without dead ends: 3223 [2021-06-05 04:17:46,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:46,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-06-05 04:17:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 2909. [2021-06-05 04:17:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 2908 states have (on average 2.9917469050894083) internal successors, (8700), 2908 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 8700 transitions. [2021-06-05 04:17:46,401 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 8700 transitions. Word has length 21 [2021-06-05 04:17:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:46,401 INFO L482 AbstractCegarLoop]: Abstraction has 2909 states and 8700 transitions. [2021-06-05 04:17:46,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 8700 transitions. [2021-06-05 04:17:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:17:46,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:46,403 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:46,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39710 [2021-06-05 04:17:46,604 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:46,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1484476376, now seen corresponding path program 404 times [2021-06-05 04:17:46,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:46,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123522929] [2021-06-05 04:17:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:46,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:46,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123522929] [2021-06-05 04:17:46,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123522929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:46,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000736253] [2021-06-05 04:17:46,675 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 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:46,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:46,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:46,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:17:46,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:46,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000736253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:46,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:46,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:17:46,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077478211] [2021-06-05 04:17:46,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:46,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:46,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:46,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:46,740 INFO L87 Difference]: Start difference. First operand 2909 states and 8700 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:46,943 INFO L93 Difference]: Finished difference Result 3418 states and 9945 transitions. [2021-06-05 04:17:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:17:46,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:17:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:46,947 INFO L225 Difference]: With dead ends: 3418 [2021-06-05 04:17:46,947 INFO L226 Difference]: Without dead ends: 3418 [2021-06-05 04:17:46,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:17:46,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-06-05 04:17:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 2927. [2021-06-05 04:17:46,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 2.9907723855092274) internal successors, (8751), 2926 states have internal predecessors, (8751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 8751 transitions. [2021-06-05 04:17:46,979 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 8751 transitions. Word has length 21 [2021-06-05 04:17:46,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:46,979 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 8751 transitions. [2021-06-05 04:17:46,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:46,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 8751 transitions. [2021-06-05 04:17:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:46,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:46,981 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:47,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39711 [2021-06-05 04:17:47,182 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:47,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:47,182 INFO L82 PathProgramCache]: Analyzing trace with hash -857679500, now seen corresponding path program 405 times [2021-06-05 04:17:47,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:47,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861090366] [2021-06-05 04:17:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:47,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:47,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861090366] [2021-06-05 04:17:47,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861090366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:47,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682819598] [2021-06-05 04:17:47,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:47,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:47,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:47,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:17:47,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:47,842 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:17:47,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:17:47,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:17:49,146 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 427 [2021-06-05 04:17:49,451 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 503 [2021-06-05 04:17:49,728 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 503 [2021-06-05 04:17:50,043 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 511 [2021-06-05 04:17:50,389 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 538 [2021-06-05 04:17:50,680 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 305 [2021-06-05 04:17:51,290 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 392 [2021-06-05 04:17:51,495 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 392 [2021-06-05 04:17:51,764 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 402 [2021-06-05 04:17:51,933 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 417 [2021-06-05 04:17:52,241 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 353 [2021-06-05 04:17:52,780 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 222 [2021-06-05 04:17:53,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:17:53,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:17:53,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:17:53,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:17:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:53,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682819598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:53,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:53,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 04:17:53,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573183797] [2021-06-05 04:17:53,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 04:17:53,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:53,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 04:17:53,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:17:53,342 INFO L87 Difference]: Start difference. First operand 2927 states and 8751 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 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 04:17:53,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:53,754 INFO L93 Difference]: Finished difference Result 3024 states and 8948 transitions. [2021-06-05 04:17:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:17:53,754 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 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 22 [2021-06-05 04:17:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:53,757 INFO L225 Difference]: With dead ends: 3024 [2021-06-05 04:17:53,757 INFO L226 Difference]: Without dead ends: 2991 [2021-06-05 04:17:53,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 543.4ms TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:17:53,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-05 04:17:53,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2948. [2021-06-05 04:17:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 2.98982015609094) internal successors, (8811), 2947 states have internal predecessors, (8811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 8811 transitions. [2021-06-05 04:17:53,785 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 8811 transitions. Word has length 22 [2021-06-05 04:17:53,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:53,785 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 8811 transitions. [2021-06-05 04:17:53,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 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 04:17:53,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 8811 transitions. [2021-06-05 04:17:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:53,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:53,787 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:53,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39712 [2021-06-05 04:17:53,988 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:53,988 INFO L82 PathProgramCache]: Analyzing trace with hash -599146780, now seen corresponding path program 406 times [2021-06-05 04:17:53,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:53,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703925109] [2021-06-05 04:17:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:54,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:54,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703925109] [2021-06-05 04:17:54,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703925109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:54,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800129903] [2021-06-05 04:17:54,110 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 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:54,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:54,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:54,134 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:17:54,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:54,590 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:17:54,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:17:54,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:17:55,564 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 289 [2021-06-05 04:17:55,733 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 309 [2021-06-05 04:17:55,901 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 309 [2021-06-05 04:17:56,089 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 317 [2021-06-05 04:17:56,200 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 324 [2021-06-05 04:17:56,515 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 400 [2021-06-05 04:17:56,694 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 291 [2021-06-05 04:17:56,852 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 292 [2021-06-05 04:17:57,339 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 216 [2021-06-05 04:17:57,516 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 243 [2021-06-05 04:17:57,758 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 337 [2021-06-05 04:17:58,012 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 358 [2021-06-05 04:17:58,266 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 358 [2021-06-05 04:17:58,547 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 364 [2021-06-05 04:17:58,791 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 368 [2021-06-05 04:17:59,714 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 254 [2021-06-05 04:18:00,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:18:00,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:18:00,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:18:00,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:18:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:00,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800129903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:00,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:00,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 04:18:00,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300389100] [2021-06-05 04:18:00,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:18:00,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:00,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:18:00,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:18:00,958 INFO L87 Difference]: Start difference. First operand 2948 states and 8811 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:18:01,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:01,342 INFO L93 Difference]: Finished difference Result 3054 states and 9036 transitions. [2021-06-05 04:18:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:18:01,343 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 22 [2021-06-05 04:18:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:01,346 INFO L225 Difference]: With dead ends: 3054 [2021-06-05 04:18:01,346 INFO L226 Difference]: Without dead ends: 3038 [2021-06-05 04:18:01,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:18:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-06-05 04:18:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2970. [2021-06-05 04:18:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.9932637251599865) internal successors, (8887), 2969 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 8887 transitions. [2021-06-05 04:18:01,374 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 8887 transitions. Word has length 22 [2021-06-05 04:18:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:01,374 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 8887 transitions. [2021-06-05 04:18:01,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:18:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 8887 transitions. [2021-06-05 04:18:01,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:01,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:01,376 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:01,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40164 [2021-06-05 04:18:01,577 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash 144436580, now seen corresponding path program 407 times [2021-06-05 04:18:01,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:01,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818795084] [2021-06-05 04:18:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:01,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:01,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818795084] [2021-06-05 04:18:01,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818795084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:01,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017974948] [2021-06-05 04:18:01,694 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 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:01,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:18:01,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:01,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:18:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:02,165 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:18:02,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:18:02,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:18:02,928 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 344 [2021-06-05 04:18:03,611 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 328 [2021-06-05 04:18:03,903 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 564 [2021-06-05 04:18:04,196 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 564 [2021-06-05 04:18:04,563 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 577 [2021-06-05 04:18:05,144 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 742 [2021-06-05 04:18:05,399 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 273 [2021-06-05 04:18:06,151 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 172 [2021-06-05 04:18:06,266 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 191 [2021-06-05 04:18:06,468 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 290 [2021-06-05 04:18:06,792 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 278 [2021-06-05 04:18:07,619 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 278 [2021-06-05 04:18:07,835 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 352 [2021-06-05 04:18:07,942 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 224 [2021-06-05 04:18:09,028 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 324 [2021-06-05 04:18:09,221 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 334 [2021-06-05 04:18:09,477 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 372 [2021-06-05 04:18:10,052 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 906 DAG size of output: 642 [2021-06-05 04:18:10,904 WARN L205 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 767 [2021-06-05 04:18:11,755 WARN L205 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 767 [2021-06-05 04:18:12,653 WARN L205 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 1211 DAG size of output: 773 [2021-06-05 04:18:13,257 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 624 [2021-06-05 04:18:13,400 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 418 [2021-06-05 04:18:14,171 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 192 [2021-06-05 04:18:14,294 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 248 [2021-06-05 04:18:14,418 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 248 [2021-06-05 04:18:14,556 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 511 DAG size of output: 252 [2021-06-05 04:18:14,706 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 301 [2021-06-05 04:18:15,044 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 239 [2021-06-05 04:18:15,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:18:16,238 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 04:18:16,239 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 04:18:16,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 04:18:17,021 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 290 [2021-06-05 04:18:17,149 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 290 [2021-06-05 04:18:17,314 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 306 [2021-06-05 04:18:17,539 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 383 [2021-06-05 04:18:17,786 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 377 [2021-06-05 04:18:18,080 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 381 [2021-06-05 04:18:18,243 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 289 [2021-06-05 04:18:19,402 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 224 [2021-06-05 04:18:20,360 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 233 [2021-06-05 04:18:20,692 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 375 [2021-06-05 04:18:21,807 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 318 [2021-06-05 04:18:21,976 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 232 [2021-06-05 04:18:23,080 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 424 [2021-06-05 04:18:23,823 WARN L205 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 706 [2021-06-05 04:18:24,699 WARN L205 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 1141 DAG size of output: 726 [2021-06-05 04:18:25,827 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 1313 DAG size of output: 869 [2021-06-05 04:18:27,175 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 1375 DAG size of output: 917 [2021-06-05 04:18:28,867 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 1507 DAG size of output: 1013 [2021-06-05 04:18:30,894 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 1655 DAG size of output: 1120 [2021-06-05 04:18:32,934 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 1655 DAG size of output: 1120 [2021-06-05 04:18:35,187 WARN L205 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 1661 DAG size of output: 1107 [2021-06-05 04:18:38,277 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 1109 DAG size of output: 1377 [2021-06-05 04:18:38,427 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 822 DAG size of output: 752 [2021-06-05 04:18:39,672 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 722 DAG size of output: 745 [2021-06-05 04:18:40,617 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 237 [2021-06-05 04:18:40,829 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 402 [2021-06-05 04:18:41,400 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 270 [2021-06-05 04:18:41,560 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 281 [2021-06-05 04:18:41,826 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 319 [2021-06-05 04:18:42,101 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 338 [2021-06-05 04:18:42,479 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 410 [2021-06-05 04:18:42,905 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 698 DAG size of output: 439 [2021-06-05 04:18:43,065 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 933 DAG size of output: 933 [2021-06-05 04:18:43,233 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 865 [2021-06-05 04:18:44,964 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 835 DAG size of output: 1011 [2021-06-05 04:18:45,991 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 391 [2021-06-05 04:18:46,219 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 575 DAG size of output: 395 [2021-06-05 04:18:46,329 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 218 [2021-06-05 04:18:46,834 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 734 DAG size of output: 520 [2021-06-05 04:18:47,352 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 800 DAG size of output: 564 [2021-06-05 04:18:48,026 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 217 [2021-06-05 04:18:48,311 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 284 [2021-06-05 04:18:48,495 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 329 [2021-06-05 04:18:49,091 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 1167 DAG size of output: 654 [2021-06-05 04:18:49,801 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 1198 DAG size of output: 683 [2021-06-05 04:18:50,518 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 1200 DAG size of output: 685 [2021-06-05 04:18:51,713 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 1640 DAG size of output: 908 [2021-06-05 04:18:52,913 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 1640 DAG size of output: 908 [2021-06-05 04:18:54,235 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 1643 DAG size of output: 908 [2021-06-05 04:18:55,102 WARN L205 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 910 DAG size of output: 673 [2021-06-05 04:18:55,379 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 324 [2021-06-05 04:18:56,093 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 332 [2021-06-05 04:18:56,295 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 332 [2021-06-05 04:18:56,498 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 324 [2021-06-05 04:18:57,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:18:57,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:18:57,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:18:57,173 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:18:57,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:18:57,173 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 04:18:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:57,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017974948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:57,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:57,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 04:18:57,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398474970] [2021-06-05 04:18:57,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:18:57,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:57,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:18:57,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:18:57,205 INFO L87 Difference]: Start difference. First operand 2970 states and 8887 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:18:57,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:57,601 INFO L93 Difference]: Finished difference Result 3077 states and 9090 transitions. [2021-06-05 04:18:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:18:57,601 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 22 [2021-06-05 04:18:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:57,604 INFO L225 Difference]: With dead ends: 3077 [2021-06-05 04:18:57,604 INFO L226 Difference]: Without dead ends: 3067 [2021-06-05 04:18:57,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:18:57,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2021-06-05 04:18:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2970. [2021-06-05 04:18:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.9932637251599865) internal successors, (8887), 2969 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 8887 transitions. [2021-06-05 04:18:57,633 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 8887 transitions. Word has length 22 [2021-06-05 04:18:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:57,633 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 8887 transitions. [2021-06-05 04:18:57,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:18:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 8887 transitions. [2021-06-05 04:18:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:57,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:57,636 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:57,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40835,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:57,837 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:57,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1666470026, now seen corresponding path program 408 times [2021-06-05 04:18:57,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:57,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520164582] [2021-06-05 04:18:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:57,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:57,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520164582] [2021-06-05 04:18:57,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520164582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:57,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087731134] [2021-06-05 04:18:57,985 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 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:58,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:18:58,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:58,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:18:58,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:58,462 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:18:58,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:18:58,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:18:59,150 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 279 [2021-06-05 04:18:59,282 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 279 [2021-06-05 04:18:59,442 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 292 [2021-06-05 04:18:59,734 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 384 [2021-06-05 04:18:59,949 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 295 [2021-06-05 04:19:00,545 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 267 [2021-06-05 04:19:00,955 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 353 [2021-06-05 04:19:01,229 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 448 [2021-06-05 04:19:01,486 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 301 [2021-06-05 04:19:02,296 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 277 [2021-06-05 04:19:02,505 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 280 [2021-06-05 04:19:03,058 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 593 [2021-06-05 04:19:03,602 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 593 [2021-06-05 04:19:04,219 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 602 [2021-06-05 04:19:04,816 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 732 [2021-06-05 04:19:05,111 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 589 DAG size of output: 442 [2021-06-05 04:19:05,359 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 327 [2021-06-05 04:19:05,911 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 303 [2021-06-05 04:19:06,143 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 433 [2021-06-05 04:19:06,467 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 470 [2021-06-05 04:19:06,763 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 470 [2021-06-05 04:19:07,086 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 474 [2021-06-05 04:19:07,408 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 410 [2021-06-05 04:19:07,601 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 335 [2021-06-05 04:19:08,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:19:08,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:19:08,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:19:08,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:19:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:08,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087731134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:08,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:08,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 04:19:08,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828537020] [2021-06-05 04:19:08,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:19:08,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:08,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:19:08,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:19:08,151 INFO L87 Difference]: Start difference. First operand 2970 states and 8887 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:19:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:08,676 INFO L93 Difference]: Finished difference Result 3120 states and 9276 transitions. [2021-06-05 04:19:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:19:08,677 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 22 [2021-06-05 04:19:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:08,680 INFO L225 Difference]: With dead ends: 3120 [2021-06-05 04:19:08,680 INFO L226 Difference]: Without dead ends: 3104 [2021-06-05 04:19:08,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 442.1ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:19:08,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-05 04:19:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3030. [2021-06-05 04:19:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.004291845493562) internal successors, (9100), 3029 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 9100 transitions. [2021-06-05 04:19:08,711 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 9100 transitions. Word has length 22 [2021-06-05 04:19:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:08,711 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 9100 transitions. [2021-06-05 04:19:08,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:19:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 9100 transitions. [2021-06-05 04:19:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:08,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:08,714 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:08,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43471 [2021-06-05 04:19:08,914 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1884913910, now seen corresponding path program 409 times [2021-06-05 04:19:08,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:08,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671278075] [2021-06-05 04:19:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:09,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:09,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671278075] [2021-06-05 04:19:09,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671278075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:09,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594836974] [2021-06-05 04:19:09,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:09,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:19:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:09,502 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:19:09,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:19:09,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:19:10,150 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 299 [2021-06-05 04:19:10,291 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 308 [2021-06-05 04:19:10,462 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 327 [2021-06-05 04:19:10,635 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 327 [2021-06-05 04:19:10,840 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 340 [2021-06-05 04:19:10,996 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 429 [2021-06-05 04:19:11,143 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 249 [2021-06-05 04:19:11,277 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 179 [2021-06-05 04:19:11,688 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 200 [2021-06-05 04:19:11,856 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 174 [2021-06-05 04:19:12,149 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 252 [2021-06-05 04:19:12,541 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 432 [2021-06-05 04:19:12,960 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 382 [2021-06-05 04:19:13,270 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 264 [2021-06-05 04:19:13,928 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 249 [2021-06-05 04:19:14,108 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 339 [2021-06-05 04:19:14,520 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 377 [2021-06-05 04:19:14,961 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 552 [2021-06-05 04:19:15,459 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 332 [2021-06-05 04:19:15,565 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 228 [2021-06-05 04:19:16,606 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 269 [2021-06-05 04:19:16,799 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 312 [2021-06-05 04:19:17,506 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 1029 DAG size of output: 698 [2021-06-05 04:19:18,354 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 848 [2021-06-05 04:19:19,174 WARN L205 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 848 [2021-06-05 04:19:20,074 WARN L205 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 1311 DAG size of output: 854 [2021-06-05 04:19:20,611 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 856 DAG size of output: 874 [2021-06-05 04:19:21,424 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 795 [2021-06-05 04:19:22,216 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 356 [2021-06-05 04:19:22,441 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 821 DAG size of output: 411 [2021-06-05 04:19:22,697 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 821 DAG size of output: 411 [2021-06-05 04:19:22,944 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 826 DAG size of output: 416 [2021-06-05 04:19:23,201 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 503 [2021-06-05 04:19:23,475 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 363 [2021-06-05 04:19:24,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:19:24,721 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 04:19:24,722 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 04:19:24,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 04:19:25,524 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 244 [2021-06-05 04:19:26,070 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 253 [2021-06-05 04:19:26,772 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 366 [2021-06-05 04:19:27,053 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 405 [2021-06-05 04:19:27,173 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 249 [2021-06-05 04:19:27,710 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 236 [2021-06-05 04:19:27,853 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 258 [2021-06-05 04:19:27,987 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 226 [2021-06-05 04:19:28,604 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 281 [2021-06-05 04:19:28,930 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 422 [2021-06-05 04:19:29,500 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 600 [2021-06-05 04:19:30,188 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 622 [2021-06-05 04:19:30,854 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 622 [2021-06-05 04:19:31,617 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 896 DAG size of output: 601 [2021-06-05 04:19:32,433 WARN L205 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 829 [2021-06-05 04:19:33,240 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 731 [2021-06-05 04:19:33,778 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 252 [2021-06-05 04:19:34,306 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 270 [2021-06-05 04:19:34,780 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 516 [2021-06-05 04:19:35,252 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 209 [2021-06-05 04:19:35,800 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 372 [2021-06-05 04:19:36,046 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 372 [2021-06-05 04:19:36,284 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 780 DAG size of output: 300 [2021-06-05 04:19:37,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:19:37,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:19:37,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:19:37,158 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:19:37,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:19:37,158 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 04:19:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:37,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594836974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:37,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:37,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 04:19:37,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688275789] [2021-06-05 04:19:37,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:19:37,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:37,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:19:37,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:19:37,190 INFO L87 Difference]: Start difference. First operand 3030 states and 9100 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:19:37,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:37,825 INFO L93 Difference]: Finished difference Result 3170 states and 9379 transitions. [2021-06-05 04:19:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:19:37,825 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 22 [2021-06-05 04:19:37,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:37,829 INFO L225 Difference]: With dead ends: 3170 [2021-06-05 04:19:37,829 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 04:19:37,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 477.7ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:19:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 04:19:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 3027. [2021-06-05 04:19:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 3026 states have (on average 3.0023132848645075) internal successors, (9085), 3026 states have internal predecessors, (9085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 9085 transitions. [2021-06-05 04:19:37,859 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 9085 transitions. Word has length 22 [2021-06-05 04:19:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:37,859 INFO L482 AbstractCegarLoop]: Abstraction has 3027 states and 9085 transitions. [2021-06-05 04:19:37,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:19:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 9085 transitions. [2021-06-05 04:19:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:37,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:37,862 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:38,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44029 [2021-06-05 04:19:38,063 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1033769778, now seen corresponding path program 410 times [2021-06-05 04:19:38,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:38,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311539841] [2021-06-05 04:19:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:38,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:38,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311539841] [2021-06-05 04:19:38,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311539841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:38,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230367633] [2021-06-05 04:19:38,178 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 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:38,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:19:38,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:38,203 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:19:38,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:38,652 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:19:38,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:19:38,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:19:39,320 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 250 [2021-06-05 04:19:39,427 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 250 [2021-06-05 04:19:39,557 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 263 [2021-06-05 04:19:39,863 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 295 [2021-06-05 04:19:40,942 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 173 [2021-06-05 04:19:41,127 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 289 [2021-06-05 04:19:41,394 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 334 [2021-06-05 04:19:42,187 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 218 [2021-06-05 04:19:42,308 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 256 [2021-06-05 04:19:42,996 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 355 [2021-06-05 04:19:43,384 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 483 [2021-06-05 04:19:43,812 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 486 [2021-06-05 04:19:44,645 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 660 [2021-06-05 04:19:45,463 WARN L205 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 660 [2021-06-05 04:19:46,375 WARN L205 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 668 [2021-06-05 04:19:46,561 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 697 [2021-06-05 04:19:47,477 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 766 [2021-06-05 04:19:47,852 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 323 [2021-06-05 04:19:48,382 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 390 [2021-06-05 04:19:48,657 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 390 [2021-06-05 04:19:48,925 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 394 [2021-06-05 04:19:49,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:19:50,135 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 04:19:50,136 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 04:19:50,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 04:19:50,887 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 257 [2021-06-05 04:19:51,004 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 257 [2021-06-05 04:19:51,145 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 268 [2021-06-05 04:19:51,407 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 360 [2021-06-05 04:19:51,553 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 246 [2021-06-05 04:19:52,185 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 293 [2021-06-05 04:19:52,321 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 293 [2021-06-05 04:19:52,481 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 297 [2021-06-05 04:19:52,692 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 347 [2021-06-05 04:19:53,771 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 213 [2021-06-05 04:19:54,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:19:54,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:19:54,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:19:54,268 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:19:54,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:19:54,269 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 04:19:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:54,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230367633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:54,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:54,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 04:19:54,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912215298] [2021-06-05 04:19:54,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:19:54,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:54,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:19:54,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:19:54,298 INFO L87 Difference]: Start difference. First operand 3027 states and 9085 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:19:54,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:54,682 INFO L93 Difference]: Finished difference Result 3114 states and 9269 transitions. [2021-06-05 04:19:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:19:54,683 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 22 [2021-06-05 04:19:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:54,686 INFO L225 Difference]: With dead ends: 3114 [2021-06-05 04:19:54,686 INFO L226 Difference]: Without dead ends: 3104 [2021-06-05 04:19:54,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 479.2ms TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:19:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-05 04:19:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3030. [2021-06-05 04:19:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.0023109937273027) internal successors, (9094), 3029 states have internal predecessors, (9094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 9094 transitions. [2021-06-05 04:19:54,715 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 9094 transitions. Word has length 22 [2021-06-05 04:19:54,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:54,715 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 9094 transitions. [2021-06-05 04:19:54,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:19:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 9094 transitions. [2021-06-05 04:19:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:54,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:54,718 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:54,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45381 [2021-06-05 04:19:54,918 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1113853020, now seen corresponding path program 411 times [2021-06-05 04:19:54,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:54,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226528140] [2021-06-05 04:19:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:55,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:55,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226528140] [2021-06-05 04:19:55,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226528140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:55,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585239988] [2021-06-05 04:19:55,035 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 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:55,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:19:55,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:55,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:19:55,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:55,550 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:19:55,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:19:55,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:19:56,179 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 229 [2021-06-05 04:19:56,803 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 212 [2021-06-05 04:19:57,733 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 272 [2021-06-05 04:19:57,875 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 279 [2021-06-05 04:19:58,213 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 407 [2021-06-05 04:19:58,503 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 407 [2021-06-05 04:19:58,829 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 623 DAG size of output: 416 [2021-06-05 04:19:58,986 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 386 [2021-06-05 04:19:59,447 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 248 [2021-06-05 04:19:59,565 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 248 [2021-06-05 04:19:59,766 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 306 [2021-06-05 04:20:00,372 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 260 [2021-06-05 04:20:00,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:20:00,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:20:00,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:20:00,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:20:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:00,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585239988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:00,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:00,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 04:20:00,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742998915] [2021-06-05 04:20:00,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:20:00,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:00,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:20:00,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:20:00,616 INFO L87 Difference]: Start difference. First operand 3030 states and 9094 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:20:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:00,997 INFO L93 Difference]: Finished difference Result 3173 states and 9458 transitions. [2021-06-05 04:20:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:20:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 22 [2021-06-05 04:20:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:01,000 INFO L225 Difference]: With dead ends: 3173 [2021-06-05 04:20:01,000 INFO L226 Difference]: Without dead ends: 3157 [2021-06-05 04:20:01,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 418.7ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:20:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-06-05 04:20:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3081. [2021-06-05 04:20:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 3.0107142857142857) internal successors, (9273), 3080 states have internal predecessors, (9273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 9273 transitions. [2021-06-05 04:20:01,031 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 9273 transitions. Word has length 22 [2021-06-05 04:20:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:01,031 INFO L482 AbstractCegarLoop]: Abstraction has 3081 states and 9273 transitions. [2021-06-05 04:20:01,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:20:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 9273 transitions. [2021-06-05 04:20:01,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:01,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:01,034 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:01,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46366,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:01,234 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:01,235 INFO L82 PathProgramCache]: Analyzing trace with hash -370269660, now seen corresponding path program 412 times [2021-06-05 04:20:01,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:01,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266918572] [2021-06-05 04:20:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:01,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:01,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266918572] [2021-06-05 04:20:01,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266918572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:01,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506369522] [2021-06-05 04:20:01,353 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 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:01,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:20:01,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:01,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:20:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:01,833 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:20:01,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:20:01,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:20:02,788 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 247 [2021-06-05 04:20:02,984 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 362 [2021-06-05 04:20:03,180 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 362 [2021-06-05 04:20:03,406 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 370 [2021-06-05 04:20:03,672 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 391 [2021-06-05 04:20:03,793 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 268 [2021-06-05 04:20:04,438 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 345 [2021-06-05 04:20:04,937 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 312 [2021-06-05 04:20:05,406 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 260 [2021-06-05 04:20:05,627 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-05 04:20:05,846 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-05 04:20:06,099 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 314 [2021-06-05 04:20:06,370 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 348 [2021-06-05 04:20:06,474 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 219 [2021-06-05 04:20:06,995 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 235 [2021-06-05 04:20:07,491 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 252 [2021-06-05 04:20:07,632 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 218 [2021-06-05 04:20:08,166 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 367 [2021-06-05 04:20:08,322 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 367 [2021-06-05 04:20:08,502 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 371 [2021-06-05 04:20:08,922 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 468 [2021-06-05 04:20:09,149 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 300 [2021-06-05 04:20:09,669 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 337 [2021-06-05 04:20:09,828 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 344 [2021-06-05 04:20:10,775 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 248 [2021-06-05 04:20:11,071 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 748 DAG size of output: 369 [2021-06-05 04:20:11,409 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 748 DAG size of output: 369 [2021-06-05 04:20:11,730 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 373 [2021-06-05 04:20:11,843 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 289 [2021-06-05 04:20:12,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:20:12,625 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 04:20:12,626 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 04:20:12,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 04:20:13,441 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 286 [2021-06-05 04:20:13,579 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 300 [2021-06-05 04:20:13,722 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 304 [2021-06-05 04:20:13,864 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 304 [2021-06-05 04:20:14,040 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 314 [2021-06-05 04:20:14,157 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 318 [2021-06-05 04:20:14,477 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 404 [2021-06-05 04:20:14,740 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 295 [2021-06-05 04:20:15,488 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 230 [2021-06-05 04:20:16,105 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 257 [2021-06-05 04:20:16,340 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 370 [2021-06-05 04:20:16,697 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 548 DAG size of output: 440 [2021-06-05 04:20:16,909 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 328 [2021-06-05 04:20:17,186 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 292 [2021-06-05 04:20:18,250 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 356 [2021-06-05 04:20:18,546 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 456 [2021-06-05 04:20:19,425 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 677 DAG size of output: 540 [2021-06-05 04:20:20,189 WARN L205 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 1074 DAG size of output: 737 [2021-06-05 04:20:20,967 WARN L205 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 1131 DAG size of output: 782 [2021-06-05 04:20:21,904 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 1150 DAG size of output: 798 [2021-06-05 04:20:22,842 WARN L205 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 1150 DAG size of output: 798 [2021-06-05 04:20:23,861 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1156 DAG size of output: 796 [2021-06-05 04:20:24,463 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 798 DAG size of output: 531 [2021-06-05 04:20:24,962 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 531 [2021-06-05 04:20:25,151 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 314 [2021-06-05 04:20:26,196 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 250 [2021-06-05 04:20:26,389 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 343 [2021-06-05 04:20:26,619 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 382 [2021-06-05 04:20:26,846 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 382 [2021-06-05 04:20:27,177 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 386 [2021-06-05 04:20:27,382 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 387 [2021-06-05 04:20:27,602 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 439 [2021-06-05 04:20:28,495 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 306 [2021-06-05 04:20:28,659 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 309 [2021-06-05 04:20:28,823 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 309 [2021-06-05 04:20:29,098 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 306 [2021-06-05 04:20:29,339 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 359 [2021-06-05 04:20:29,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:20:29,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:20:29,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:20:29,757 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:20:29,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:20:29,758 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 04:20:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:29,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506369522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:29,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:29,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 04:20:29,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099699503] [2021-06-05 04:20:29,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:20:29,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:29,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:20:29,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:20:29,789 INFO L87 Difference]: Start difference. First operand 3081 states and 9273 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:20:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:30,566 INFO L93 Difference]: Finished difference Result 3278 states and 9699 transitions. [2021-06-05 04:20:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:20:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 22 [2021-06-05 04:20:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:30,570 INFO L225 Difference]: With dead ends: 3278 [2021-06-05 04:20:30,570 INFO L226 Difference]: Without dead ends: 3252 [2021-06-05 04:20:30,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 587.2ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:20:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2021-06-05 04:20:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 3085. [2021-06-05 04:20:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.0103761348897535) internal successors, (9284), 3084 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 9284 transitions. [2021-06-05 04:20:30,605 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 9284 transitions. Word has length 22 [2021-06-05 04:20:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:30,605 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 9284 transitions. [2021-06-05 04:20:30,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:20:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 9284 transitions. [2021-06-05 04:20:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:30,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:30,608 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:30,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46810 [2021-06-05 04:20:30,809 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash 480874472, now seen corresponding path program 413 times [2021-06-05 04:20:30,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:30,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672607404] [2021-06-05 04:20:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:30,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:30,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672607404] [2021-06-05 04:20:30,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672607404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:30,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633608998] [2021-06-05 04:20:30,926 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 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:30,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:20:30,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:30,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:20:30,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:31,418 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:20:31,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:20:31,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:20:32,261 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 315 [2021-06-05 04:20:32,391 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 315 [2021-06-05 04:20:32,551 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 328 [2021-06-05 04:20:32,703 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 401 [2021-06-05 04:20:33,597 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-05 04:20:33,750 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-05 04:20:33,929 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 320 [2021-06-05 04:20:35,361 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 219 [2021-06-05 04:20:35,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:20:36,135 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 04:20:36,136 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 04:20:36,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 04:20:36,847 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 264 [2021-06-05 04:20:36,960 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 264 [2021-06-05 04:20:37,095 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 257 [2021-06-05 04:20:37,242 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 307 [2021-06-05 04:20:37,486 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 299 [2021-06-05 04:20:38,121 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 322 [2021-06-05 04:20:38,308 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 339 [2021-06-05 04:20:39,120 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 251 [2021-06-05 04:20:39,499 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 474 [2021-06-05 04:20:39,906 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 474 [2021-06-05 04:20:40,365 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 483 [2021-06-05 04:20:41,324 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 362 [2021-06-05 04:20:42,165 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 250 [2021-06-05 04:20:42,312 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 257 [2021-06-05 04:20:42,525 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 290 [2021-06-05 04:20:42,825 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 378 [2021-06-05 04:20:43,124 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 378 [2021-06-05 04:20:43,626 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 426 [2021-06-05 04:20:43,925 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 439 [2021-06-05 04:20:44,853 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 226 [2021-06-05 04:20:45,068 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 221 [2021-06-05 04:20:45,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:20:45,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:20:45,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:20:45,305 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:20:45,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:20:45,306 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 04:20:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:45,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633608998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:45,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:45,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 04:20:45,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536832877] [2021-06-05 04:20:45,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:20:45,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:45,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:20:45,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:20:45,336 INFO L87 Difference]: Start difference. First operand 3085 states and 9284 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:20:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:45,815 INFO L93 Difference]: Finished difference Result 3177 states and 9485 transitions. [2021-06-05 04:20:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:20:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 22 [2021-06-05 04:20:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:45,818 INFO L225 Difference]: With dead ends: 3177 [2021-06-05 04:20:45,818 INFO L226 Difference]: Without dead ends: 3167 [2021-06-05 04:20:45,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 525.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:20:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-06-05 04:20:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3091. [2021-06-05 04:20:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3090 states have (on average 3.010355987055016) internal successors, (9302), 3090 states have internal predecessors, (9302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 9302 transitions. [2021-06-05 04:20:45,849 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 9302 transitions. Word has length 22 [2021-06-05 04:20:45,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:45,849 INFO L482 AbstractCegarLoop]: Abstraction has 3091 states and 9302 transitions. [2021-06-05 04:20:45,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:20:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 9302 transitions. [2021-06-05 04:20:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:45,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:45,852 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:46,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48443,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:46,052 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:46,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:46,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1096538788, now seen corresponding path program 414 times [2021-06-05 04:20:46,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:46,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642410155] [2021-06-05 04:20:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:46,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:46,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642410155] [2021-06-05 04:20:46,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642410155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:46,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102352921] [2021-06-05 04:20:46,197 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 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:46,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:20:46,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:46,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:20:46,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:46,690 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:20:46,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:20:46,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:20:47,276 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 343 [2021-06-05 04:20:47,402 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 350 [2021-06-05 04:20:47,555 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 362 [2021-06-05 04:20:48,263 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 505 [2021-06-05 04:20:48,567 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 505 [2021-06-05 04:20:48,892 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 518 [2021-06-05 04:20:49,544 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 749 [2021-06-05 04:20:49,673 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 495 [2021-06-05 04:20:49,852 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 384 [2021-06-05 04:20:50,097 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 331 [2021-06-05 04:20:50,979 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 290 [2021-06-05 04:20:51,221 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 351 [2021-06-05 04:20:52,059 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 335 [2021-06-05 04:20:52,423 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 764 DAG size of output: 417 [2021-06-05 04:20:53,375 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 284 [2021-06-05 04:20:53,563 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 323 [2021-06-05 04:20:53,797 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 346 [2021-06-05 04:20:54,413 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 1065 DAG size of output: 648 [2021-06-05 04:20:55,298 WARN L205 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 1352 DAG size of output: 729 [2021-06-05 04:20:56,153 WARN L205 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 1352 DAG size of output: 729 [2021-06-05 04:20:57,095 WARN L205 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 1358 DAG size of output: 735 [2021-06-05 04:20:57,382 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 735 DAG size of output: 530 [2021-06-05 04:20:57,647 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 369 [2021-06-05 04:20:58,349 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 300 [2021-06-05 04:20:58,972 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 273 [2021-06-05 04:20:59,250 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 516 [2021-06-05 04:20:59,502 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 516 [2021-06-05 04:20:59,788 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 519 [2021-06-05 04:20:59,987 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 575 [2021-06-05 04:21:00,323 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 374 [2021-06-05 04:21:00,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:21:01,134 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 04:21:01,134 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 04:21:01,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 04:21:01,683 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 249 [2021-06-05 04:21:02,105 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 219 [2021-06-05 04:21:02,313 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 252 [2021-06-05 04:21:02,544 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 366 [2021-06-05 04:21:02,769 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 366 [2021-06-05 04:21:03,069 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 375 [2021-06-05 04:21:03,428 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 420 [2021-06-05 04:21:03,664 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 383 [2021-06-05 04:21:04,053 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 419 [2021-06-05 04:21:04,432 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 410 [2021-06-05 04:21:04,677 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 233 [2021-06-05 04:21:05,384 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 186 [2021-06-05 04:21:05,553 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 227 [2021-06-05 04:21:06,146 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 202 [2021-06-05 04:21:06,511 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 240 [2021-06-05 04:21:06,893 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 354 [2021-06-05 04:21:07,408 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 417 [2021-06-05 04:21:07,990 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 438 [2021-06-05 04:21:08,372 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 411 [2021-06-05 04:21:08,711 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 402 [2021-06-05 04:21:09,098 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 367 [2021-06-05 04:21:09,896 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 194 [2021-06-05 04:21:10,085 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 261 [2021-06-05 04:21:10,896 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 328 [2021-06-05 04:21:11,302 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 391 [2021-06-05 04:21:11,794 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 412 [2021-06-05 04:21:12,801 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 795 DAG size of output: 621 [2021-06-05 04:21:13,066 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 402 [2021-06-05 04:21:13,466 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 438 [2021-06-05 04:21:13,854 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 429 [2021-06-05 04:21:14,750 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 285 [2021-06-05 04:21:14,965 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 324 [2021-06-05 04:21:15,202 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 309 [2021-06-05 04:21:15,449 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 249 [2021-06-05 04:21:15,609 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 241 [2021-06-05 04:21:16,004 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 241 [2021-06-05 04:21:16,449 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 260 [2021-06-05 04:21:16,614 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 269 [2021-06-05 04:21:16,830 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 277 [2021-06-05 04:21:17,082 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 308 [2021-06-05 04:21:17,434 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 350 [2021-06-05 04:21:18,072 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 675 DAG size of output: 506 [2021-06-05 04:21:18,866 WARN L205 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 759 DAG size of output: 579 [2021-06-05 04:21:19,777 WARN L205 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 602 [2021-06-05 04:21:20,161 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 426 [2021-06-05 04:21:20,512 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 417 [2021-06-05 04:21:20,906 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 378 [2021-06-05 04:21:21,263 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 385 [2021-06-05 04:21:22,105 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 216 [2021-06-05 04:21:22,297 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 290 [2021-06-05 04:21:22,741 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 458 [2021-06-05 04:21:23,294 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 198 [2021-06-05 04:21:23,759 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 226 [2021-06-05 04:21:23,892 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 236 [2021-06-05 04:21:24,170 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 340 [2021-06-05 04:21:24,762 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 713 DAG size of output: 517 [2021-06-05 04:21:25,518 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 593 [2021-06-05 04:21:26,391 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 616 [2021-06-05 04:21:28,158 WARN L205 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 1211 DAG size of output: 855 [2021-06-05 04:21:31,304 WARN L205 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 1594 DAG size of output: 1219 [2021-06-05 04:21:34,458 WARN L205 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 1594 DAG size of output: 1219 [2021-06-05 04:21:38,083 WARN L205 SmtUtils]: Spent 3.62 s on a formula simplification. DAG size of input: 1603 DAG size of output: 1222 [2021-06-05 04:21:38,222 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 1217 [2021-06-05 04:21:39,548 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 1219 DAG size of output: 709 [2021-06-05 04:21:40,201 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 603 DAG size of output: 597 [2021-06-05 04:21:42,284 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 201 [2021-06-05 04:21:42,449 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 247 [2021-06-05 04:21:42,773 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 327 [2021-06-05 04:21:43,214 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 417 [2021-06-05 04:21:43,653 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 417 [2021-06-05 04:21:43,927 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 288 [2021-06-05 04:21:44,657 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 227 [2021-06-05 04:21:44,763 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 227 [2021-06-05 04:21:44,885 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 230 [2021-06-05 04:21:45,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:21:45,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:21:45,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:21:45,189 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:21:45,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:21:45,189 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 04:21:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:45,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102352921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:45,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:45,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 04:21:45,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756747939] [2021-06-05 04:21:45,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:21:45,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:45,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:21:45,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:21:45,220 INFO L87 Difference]: Start difference. First operand 3091 states and 9302 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:21:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:45,703 INFO L93 Difference]: Finished difference Result 3203 states and 9543 transitions. [2021-06-05 04:21:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:21:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 22 [2021-06-05 04:21:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:45,706 INFO L225 Difference]: With dead ends: 3203 [2021-06-05 04:21:45,706 INFO L226 Difference]: Without dead ends: 3193 [2021-06-05 04:21:45,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 569.6ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:21:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-06-05 04:21:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 3091. [2021-06-05 04:21:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3090 states have (on average 3.010355987055016) internal successors, (9302), 3090 states have internal predecessors, (9302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 9302 transitions. [2021-06-05 04:21:45,738 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 9302 transitions. Word has length 22 [2021-06-05 04:21:45,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:45,738 INFO L482 AbstractCegarLoop]: Abstraction has 3091 states and 9302 transitions. [2021-06-05 04:21:45,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 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 04:21:45,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 9302 transitions. [2021-06-05 04:21:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:21:45,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:45,741 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:45,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49540,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:45,942 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:45,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:45,942 INFO L82 PathProgramCache]: Analyzing trace with hash -227504460, now seen corresponding path program 415 times [2021-06-05 04:21:45,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:45,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696798045] [2021-06-05 04:21:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:21:46,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:46,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696798045] [2021-06-05 04:21:46,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696798045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:46,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515682541] [2021-06-05 04:21:46,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:46,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:21:46,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:46,534 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:21:46,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:21:46,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:21:47,333 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 261 [2021-06-05 04:21:47,479 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 261 [2021-06-05 04:21:47,614 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 270 [2021-06-05 04:21:47,769 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 306 [2021-06-05 04:21:48,877 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 280 [2021-06-05 04:21:49,133 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 442 [2021-06-05 04:21:49,387 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 442 [2021-06-05 04:21:49,683 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 451 [2021-06-05 04:21:50,077 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 406 [2021-06-05 04:21:50,283 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 339 [2021-06-05 04:21:50,404 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 267 [2021-06-05 04:21:51,029 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 289 [2021-06-05 04:21:51,274 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 321 [2021-06-05 04:21:51,478 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 321 [2021-06-05 04:21:51,704 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 328 [2021-06-05 04:21:51,865 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 328 [2021-06-05 04:21:52,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:21:52,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:21:52,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:21:52,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:21:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:52,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515682541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:52,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:52,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 04:21:52,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565983169] [2021-06-05 04:21:52,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:21:52,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:52,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:21:52,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:21:52,357 INFO L87 Difference]: Start difference. First operand 3091 states and 9302 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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 04:21:52,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:52,633 INFO L93 Difference]: Finished difference Result 3122 states and 9346 transitions. [2021-06-05 04:21:52,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:21:52,633 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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 22 [2021-06-05 04:21:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:52,636 INFO L225 Difference]: With dead ends: 3122 [2021-06-05 04:21:52,636 INFO L226 Difference]: Without dead ends: 3104 [2021-06-05 04:21:52,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:21:52,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-05 04:21:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3091. [2021-06-05 04:21:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3090 states have (on average 3.0093851132686082) internal successors, (9299), 3090 states have internal predecessors, (9299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 9299 transitions. [2021-06-05 04:21:52,670 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 9299 transitions. Word has length 22 [2021-06-05 04:21:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:52,670 INFO L482 AbstractCegarLoop]: Abstraction has 3091 states and 9299 transitions. [2021-06-05 04:21:52,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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 04:21:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 9299 transitions. [2021-06-05 04:21:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:21:52,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:52,672 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:52,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51755,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:52,873 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash 158696654, now seen corresponding path program 416 times [2021-06-05 04:21:52,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:52,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617075065] [2021-06-05 04:21:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:52,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:52,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617075065] [2021-06-05 04:21:52,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617075065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:52,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539292025] [2021-06-05 04:21:52,976 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 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:53,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:21:53,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:53,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:21:53,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:53,440 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:21:53,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:21:53,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:21:54,610 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 295 [2021-06-05 04:21:54,875 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 456 [2021-06-05 04:21:55,139 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 456 [2021-06-05 04:21:55,443 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 464 [2021-06-05 04:21:55,696 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 470 [2021-06-05 04:21:55,990 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 486 [2021-06-05 04:21:56,644 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 276 [2021-06-05 04:21:57,233 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 253 [2021-06-05 04:21:57,657 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 356 [2021-06-05 04:21:57,964 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 714 DAG size of output: 554 [2021-06-05 04:21:58,386 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 766 DAG size of output: 604 [2021-06-05 04:21:58,847 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 781 DAG size of output: 610 [2021-06-05 04:21:59,309 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 781 DAG size of output: 610 [2021-06-05 04:21:59,838 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 784 DAG size of output: 614 [2021-06-05 04:22:00,363 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 585 [2021-06-05 04:22:00,571 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 338 [2021-06-05 04:22:01,272 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 363 [2021-06-05 04:22:01,572 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 308 [2021-06-05 04:22:01,953 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 260 [2021-06-05 04:22:02,070 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 260 [2021-06-05 04:22:02,273 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 265 [2021-06-05 04:22:03,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:22:03,387 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 04:22:03,387 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 04:22:03,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 04:22:05,029 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 218 [2021-06-05 04:22:05,176 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 229 [2021-06-05 04:22:05,395 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 293 [2021-06-05 04:22:05,659 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 302 [2021-06-05 04:22:05,973 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 307 [2021-06-05 04:22:06,378 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 329 [2021-06-05 04:22:06,757 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 329 [2021-06-05 04:22:07,176 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 332 [2021-06-05 04:22:07,646 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 410 [2021-06-05 04:22:07,885 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 292 [2021-06-05 04:22:08,027 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 233 [2021-06-05 04:22:08,211 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 268 [2021-06-05 04:22:08,896 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 258 [2021-06-05 04:22:09,057 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 258 [2021-06-05 04:22:09,242 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 266 [2021-06-05 04:22:09,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:22:09,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:22:09,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:22:09,839 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 04:22:09,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:22:09,839 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 04:22:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:22:09,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539292025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:22:09,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:22:09,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 04:22:09,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902926709] [2021-06-05 04:22:09,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:22:09,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:22:09,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:22:09,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:22:09,868 INFO L87 Difference]: Start difference. First operand 3091 states and 9299 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:22:10,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:22:10,243 INFO L93 Difference]: Finished difference Result 3246 states and 9616 transitions. [2021-06-05 04:22:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:22:10,243 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:22:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:22:10,246 INFO L225 Difference]: With dead ends: 3246 [2021-06-05 04:22:10,247 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 04:22:10,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:22:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 04:22:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3089. [2021-06-05 04:22:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 3088 states have (on average 3.0093911917098444) internal successors, (9293), 3088 states have internal predecessors, (9293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:22:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 9293 transitions. [2021-06-05 04:22:10,280 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 9293 transitions. Word has length 22 [2021-06-05 04:22:10,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:22:10,280 INFO L482 AbstractCegarLoop]: Abstraction has 3089 states and 9293 transitions. [2021-06-05 04:22:10,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:22:10,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 9293 transitions. [2021-06-05 04:22:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:22:10,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:22:10,283 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:22:10,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52179,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:22:10,484 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:22:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:22:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash 696552232, now seen corresponding path program 417 times [2021-06-05 04:22:10,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:22:10,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297762150] [2021-06-05 04:22:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:22:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:22:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:22:10,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:22:10,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297762150] [2021-06-05 04:22:10,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297762150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:22:10,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026038296] [2021-06-05 04:22:10,597 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 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:22:10,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:22:10,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:22:10,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 04:22:10,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:22:11,077 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:22:11,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:22:11,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:22:11,748 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 287 [2021-06-05 04:22:11,865 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 287 [2021-06-05 04:22:12,036 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 300 [2021-06-05 04:22:12,183 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 360 [2021-06-05 04:22:12,288 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 197 [2021-06-05 04:22:13,109 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 376 [2021-06-05 04:22:13,354 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 376 [2021-06-05 04:22:13,594 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 382 [2021-06-05 04:22:13,827 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 346 [2021-06-05 04:22:14,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:22:15,104 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 04:22:15,105 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 04:22:15,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 04:22:15,828 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 255 [2021-06-05 04:22:16,628 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 264 [2021-06-05 04:22:16,883 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 374 [2021-06-05 04:22:17,141 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 374 [2021-06-05 04:22:17,487 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 609 DAG size of output: 385 [2021-06-05 04:22:18,041 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 444 [2021-06-05 04:22:18,696 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 470 [2021-06-05 04:22:19,209 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 408 [2021-06-05 04:22:19,397 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 215 [2021-06-05 04:22:20,614 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 269 [2021-06-05 04:22:20,781 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 224 [2021-06-05 04:22:21,194 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 216 [2021-06-05 04:22:21,902 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 279 [2021-06-05 04:22:22,219 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 422 [2021-06-05 04:22:22,866 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 758 DAG size of output: 620 [2021-06-05 04:22:23,419 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 421 [2021-06-05 04:22:24,679 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 231 [2021-06-05 04:22:25,234 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 241 [2021-06-05 04:22:25,470 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 358 Received shutdown request... [2021-06-05 04:22:26,004 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 554 [2021-06-05 04:22:27,349 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 1192 DAG size of output: 946 [2021-06-05 04:22:27,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53233,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:22:27,555 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:22:27,556 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:22:27,558 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:22:27,558 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:22:27 BasicIcfg [2021-06-05 04:22:27,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:22:27,559 INFO L168 Benchmark]: Toolchain (without parser) took 870924.46 ms. Allocated memory was 369.1 MB in the beginning and 3.3 GB in the end (delta: 2.9 GB). Free memory was 348.0 MB in the beginning and 2.4 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-06-05 04:22:27,559 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 369.1 MB. Free memory was 349.1 MB in the beginning and 349.1 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:22:27,559 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.45 ms. Allocated memory is still 369.1 MB. Free memory was 347.9 MB in the beginning and 346.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:22:27,559 INFO L168 Benchmark]: Boogie Preprocessor took 19.61 ms. Allocated memory is still 369.1 MB. Free memory was 346.4 MB in the beginning and 345.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:22:27,559 INFO L168 Benchmark]: RCFGBuilder took 388.38 ms. Allocated memory is still 369.1 MB. Free memory was 345.4 MB in the beginning and 328.2 MB in the end (delta: 17.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-06-05 04:22:27,559 INFO L168 Benchmark]: TraceAbstraction took 870486.04 ms. Allocated memory was 369.1 MB in the beginning and 3.3 GB in the end (delta: 2.9 GB). Free memory was 327.8 MB in the beginning and 2.4 GB in the end (delta: -2.1 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-06-05 04:22:27,559 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 0.15 ms. Allocated memory is still 369.1 MB. Free memory was 349.1 MB in the beginning and 349.1 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.45 ms. Allocated memory is still 369.1 MB. Free memory was 347.9 MB in the beginning and 346.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.61 ms. Allocated memory is still 369.1 MB. Free memory was 346.4 MB in the beginning and 345.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 388.38 ms. Allocated memory is still 369.1 MB. Free memory was 345.4 MB in the beginning and 328.2 MB in the end (delta: 17.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 870486.04 ms. Allocated memory was 369.1 MB in the beginning and 3.3 GB in the end (delta: 2.9 GB). Free memory was 327.8 MB in the beginning and 2.4 GB in the end (delta: -2.1 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 870409.4ms, OverallIterations: 429, TraceHistogramMax: 9, EmptinessCheckTime: 543.3ms, AutomataDifference: 121528.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8938 SDtfs, 23075 SDslu, 68002 SDs, 0 SdLazy, 134057 SolverSat, 15862 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52406.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16148 GetRequests, 5948 SyntacticMatches, 182 SemanticMatches, 10018 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64548 ImplicationChecksByTransitivity, 110485.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3997occurred in iteration=279, InterpolantAutomatonStates: 8547, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6793.6ms AutomataMinimizationTime, 428 MinimizatonAttempts, 90063 StatesRemovedByMinimization, 425 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1180.7ms SsaConstructionTime, 4231.7ms SatisfiabilityAnalysisTime, 624798.9ms InterpolantComputationTime, 15842 NumberOfCodeBlocks, 15842 NumberOfCodeBlocksAsserted, 1699 NumberOfCheckSat, 14990 ConstructedInterpolants, 9 QuantifiedInterpolants, 145373 SizeOfPredicates, 578 NumberOfNonLiveVariables, 31439 ConjunctsInSsa, 10165 ConjunctsInUnsatCore, 852 InterpolantComputations, 4 PerfectInterpolantSequences, 5301/25345 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown