/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:38:56,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:38:56,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:38:56,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:38:56,520 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 [2021-08-21 12:38:56,553 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:38:56,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:38:56,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:38:56,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:38:56,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:38:56,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:38:56,558 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:38:56,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:38:56,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:38:56,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:38:56,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:38:56,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:38:56,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:38:56,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:38:56,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:38:56,560 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:38:56,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:38:56,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:38:56,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:38:56,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:38:56,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:38:56,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:38:56,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:38:56,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:38:56,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:38:56,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:38:56,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:38:56,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:38:56,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:38:56,562 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:38:56,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:38:56,562 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:38:56,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:38:56,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:38:56,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:38:56,891 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:38:56,892 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:38:56,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl [2021-08-21 12:38:56,893 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl' [2021-08-21 12:38:56,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:38:56,937 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:38:56,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:38:56,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:38:56,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:38:56,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:38:56" (1/1) ... [2021-08-21 12:38:56,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:38:56" (1/1) ... [2021-08-21 12:38:56,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:38:56,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:38:56,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:38:56,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:38:56,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:38:56" (1/1) ... [2021-08-21 12:38:56,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:38:56" (1/1) ... [2021-08-21 12:38:56,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:38:56" (1/1) ... [2021-08-21 12:38:56,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:38:56" (1/1) ... [2021-08-21 12:38:56,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:38:56" (1/1) ... [2021-08-21 12:38:56,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:38:56" (1/1) ... [2021-08-21 12:38:56,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:38:56" (1/1) ... [2021-08-21 12:38:56,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:38:56,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:38:56,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:38:56,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:38:56,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:38:56" (1/1) ... [2021-08-21 12:38:56,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:38:56,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:57,010 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:38:57,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:38:57,041 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:38:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:38:57,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:38:57,041 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:38:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:38:57,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:38:57,041 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:38:57,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:38:57,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:38:57,042 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:38:57,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:38:57,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:38:57,042 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 12:38:57,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 12:38:57,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 12:38:57,043 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:38:57,334 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:38:57,335 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:38:57,337 INFO L202 PluginConnector]: Adding new model difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:38:57 BoogieIcfgContainer [2021-08-21 12:38:57,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:38:57,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:38:57,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:38:57,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:38:57,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:38:56" (1/2) ... [2021-08-21 12:38:57,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341765b7 and model type difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:38:57, skipping insertion in model container [2021-08-21 12:38:57,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:38:57" (2/2) ... [2021-08-21 12:38:57,343 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det.wvr.bpl [2021-08-21 12:38:57,357 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:38:57,358 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:38:57,358 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:38:57,358 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:38:57,448 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 12:38:57,499 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:38:57,507 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:38:57,508 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 12:38:57,519 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 40 transitions, 112 flow [2021-08-21 12:38:57,574 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:57,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:57,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:38:57,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:57,594 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:57,594 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:38:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:57,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1755915471, now seen corresponding path program 1 times [2021-08-21 12:38:57,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:57,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032960576] [2021-08-21 12:38:57,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:57,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:57,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:57,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032960576] [2021-08-21 12:38:57,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032960576] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:38:57,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:38:57,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:38:57,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045956312] [2021-08-21 12:38:57,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:38:57,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:57,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:38:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:38:57,865 INFO L87 Difference]: Start difference. First operand has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-08-21 12:38:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:57,972 INFO L93 Difference]: Finished difference Result 1268 states and 4623 transitions. [2021-08-21 12:38:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:38:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 26 [2021-08-21 12:38:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:58,007 INFO L225 Difference]: With dead ends: 1268 [2021-08-21 12:38:58,007 INFO L226 Difference]: Without dead ends: 1057 [2021-08-21 12:38:58,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:38:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-08-21 12:38:58,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 776. [2021-08-21 12:38:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.7716129032258063) internal successors, (2923), 775 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2923 transitions. [2021-08-21 12:38:58,122 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2923 transitions. Word has length 26 [2021-08-21 12:38:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:58,123 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 2923 transitions. [2021-08-21 12:38:58,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-08-21 12:38:58,124 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2923 transitions. [2021-08-21 12:38:58,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:38:58,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:58,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:58,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:38:58,129 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:38:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:58,130 INFO L82 PathProgramCache]: Analyzing trace with hash -46127411, now seen corresponding path program 1 times [2021-08-21 12:38:58,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:58,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891948970] [2021-08-21 12:38:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:58,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:58,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:58,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891948970] [2021-08-21 12:38:58,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891948970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:58,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264382569] [2021-08-21 12:38:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:58,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:58,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:58,214 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:38:58,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:38:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:58,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:38:58,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:58,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264382569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:58,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:58,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-21 12:38:58,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500939099] [2021-08-21 12:38:58,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:38:58,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:58,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:38:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:38:58,651 INFO L87 Difference]: Start difference. First operand 776 states and 2923 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-08-21 12:38:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:58,778 INFO L93 Difference]: Finished difference Result 1233 states and 4561 transitions. [2021-08-21 12:38:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:38:58,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:38:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:58,787 INFO L225 Difference]: With dead ends: 1233 [2021-08-21 12:38:58,787 INFO L226 Difference]: Without dead ends: 1233 [2021-08-21 12:38:58,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:38:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-08-21 12:38:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 868. [2021-08-21 12:38:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.795847750865052) internal successors, (3291), 867 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3291 transitions. [2021-08-21 12:38:58,826 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3291 transitions. Word has length 28 [2021-08-21 12:38:58,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:58,826 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 3291 transitions. [2021-08-21 12:38:58,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-08-21 12:38:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3291 transitions. [2021-08-21 12:38:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:38:58,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:58,830 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:58,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:59,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:59,031 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:38:59,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:59,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1167628143, now seen corresponding path program 1 times [2021-08-21 12:38:59,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:59,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886030690] [2021-08-21 12:38:59,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:59,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:59,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:59,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886030690] [2021-08-21 12:38:59,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886030690] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:38:59,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:38:59,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:38:59,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131966782] [2021-08-21 12:38:59,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:38:59,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:59,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:38:59,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:38:59,106 INFO L87 Difference]: Start difference. First operand 868 states and 3291 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:59,182 INFO L93 Difference]: Finished difference Result 1101 states and 3979 transitions. [2021-08-21 12:38:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:38:59,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:38:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:59,190 INFO L225 Difference]: With dead ends: 1101 [2021-08-21 12:38:59,190 INFO L226 Difference]: Without dead ends: 1047 [2021-08-21 12:38:59,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:38:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-08-21 12:38:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 912. [2021-08-21 12:38:59,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.773874862788145) internal successors, (3438), 911 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3438 transitions. [2021-08-21 12:38:59,252 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3438 transitions. Word has length 28 [2021-08-21 12:38:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:59,252 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 3438 transitions. [2021-08-21 12:38:59,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3438 transitions. [2021-08-21 12:38:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:38:59,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:59,257 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:59,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:38:59,258 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:38:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:59,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1666995535, now seen corresponding path program 2 times [2021-08-21 12:38:59,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:59,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951568200] [2021-08-21 12:38:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:59,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:59,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:59,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951568200] [2021-08-21 12:38:59,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951568200] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:38:59,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:38:59,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:38:59,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999257488] [2021-08-21 12:38:59,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:38:59,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:59,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:38:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:38:59,359 INFO L87 Difference]: Start difference. First operand 912 states and 3438 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:59,419 INFO L93 Difference]: Finished difference Result 834 states and 3134 transitions. [2021-08-21 12:38:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:38:59,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:38:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:59,426 INFO L225 Difference]: With dead ends: 834 [2021-08-21 12:38:59,427 INFO L226 Difference]: Without dead ends: 834 [2021-08-21 12:38:59,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:38:59,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-08-21 12:38:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 774. [2021-08-21 12:38:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.8007761966364813) internal successors, (2938), 773 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2938 transitions. [2021-08-21 12:38:59,461 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2938 transitions. Word has length 28 [2021-08-21 12:38:59,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:59,462 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 2938 transitions. [2021-08-21 12:38:59,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:59,462 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2938 transitions. [2021-08-21 12:38:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:38:59,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:59,467 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:59,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:38:59,467 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:38:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:59,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1980069109, now seen corresponding path program 2 times [2021-08-21 12:38:59,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:59,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842423025] [2021-08-21 12:38:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:59,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:59,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:59,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842423025] [2021-08-21 12:38:59,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842423025] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:38:59,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:38:59,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:38:59,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815898688] [2021-08-21 12:38:59,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:38:59,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:59,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:38:59,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:38:59,540 INFO L87 Difference]: Start difference. First operand 774 states and 2938 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:59,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:59,608 INFO L93 Difference]: Finished difference Result 878 states and 3300 transitions. [2021-08-21 12:38:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:38:59,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:38:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:59,614 INFO L225 Difference]: With dead ends: 878 [2021-08-21 12:38:59,615 INFO L226 Difference]: Without dead ends: 838 [2021-08-21 12:38:59,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:38:59,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-08-21 12:38:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 726. [2021-08-21 12:38:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.8096551724137933) internal successors, (2762), 725 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2762 transitions. [2021-08-21 12:38:59,641 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2762 transitions. Word has length 28 [2021-08-21 12:38:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:59,641 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 2762 transitions. [2021-08-21 12:38:59,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:59,641 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2762 transitions. [2021-08-21 12:38:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:38:59,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:59,647 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:59,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:38:59,648 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:38:59,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:59,648 INFO L82 PathProgramCache]: Analyzing trace with hash 276238829, now seen corresponding path program 1 times [2021-08-21 12:38:59,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:59,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028847364] [2021-08-21 12:38:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:59,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:59,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:59,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028847364] [2021-08-21 12:38:59,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028847364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:59,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881031732] [2021-08-21 12:38:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:59,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:59,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:59,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:38:59,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:38:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:59,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:38:59,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:00,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881031732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:00,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:00,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-08-21 12:39:00,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079091427] [2021-08-21 12:39:00,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:39:00,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:00,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:39:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:39:00,208 INFO L87 Difference]: Start difference. First operand 726 states and 2762 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:00,295 INFO L93 Difference]: Finished difference Result 3314 states and 12458 transitions. [2021-08-21 12:39:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:39:00,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:39:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:00,316 INFO L225 Difference]: With dead ends: 3314 [2021-08-21 12:39:00,317 INFO L226 Difference]: Without dead ends: 3000 [2021-08-21 12:39:00,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:39:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-08-21 12:39:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2163. [2021-08-21 12:39:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.01063829787234) internal successors, (8671), 2162 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:00,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 8671 transitions. [2021-08-21 12:39:00,419 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 8671 transitions. Word has length 30 [2021-08-21 12:39:00,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:00,420 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 8671 transitions. [2021-08-21 12:39:00,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:00,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 8671 transitions. [2021-08-21 12:39:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:39:00,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:00,428 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:00,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:00,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 12:39:00,649 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:00,649 INFO L82 PathProgramCache]: Analyzing trace with hash -156136659, now seen corresponding path program 2 times [2021-08-21 12:39:00,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:00,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673451335] [2021-08-21 12:39:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:00,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:39:00,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:00,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673451335] [2021-08-21 12:39:00,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673451335] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:39:00,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:39:00,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:39:00,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471522248] [2021-08-21 12:39:00,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:39:00,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:00,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:39:00,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:39:00,731 INFO L87 Difference]: Start difference. First operand 2163 states and 8671 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:00,858 INFO L93 Difference]: Finished difference Result 3426 states and 13470 transitions. [2021-08-21 12:39:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:39:00,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:39:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:00,885 INFO L225 Difference]: With dead ends: 3426 [2021-08-21 12:39:00,885 INFO L226 Difference]: Without dead ends: 3395 [2021-08-21 12:39:00,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:39:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-08-21 12:39:00,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2948. [2021-08-21 12:39:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 4.058025110281642) internal successors, (11959), 2947 states have internal predecessors, (11959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 11959 transitions. [2021-08-21 12:39:01,008 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 11959 transitions. Word has length 30 [2021-08-21 12:39:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:01,008 INFO L470 AbstractCegarLoop]: Abstraction has 2948 states and 11959 transitions. [2021-08-21 12:39:01,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:01,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 11959 transitions. [2021-08-21 12:39:01,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:01,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:01,019 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:01,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 12:39:01,019 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:01,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1650400021, now seen corresponding path program 3 times [2021-08-21 12:39:01,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:01,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023798591] [2021-08-21 12:39:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:01,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:01,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:01,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023798591] [2021-08-21 12:39:01,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023798591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:01,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486229376] [2021-08-21 12:39:01,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:39:01,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:01,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:01,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:01,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:39:01,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:39:01,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:01,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:39:01,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:01,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486229376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:01,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:01,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:39:01,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574173944] [2021-08-21 12:39:01,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:39:01,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:39:01,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:39:01,546 INFO L87 Difference]: Start difference. First operand 2948 states and 11959 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:01,952 INFO L93 Difference]: Finished difference Result 10235 states and 40121 transitions. [2021-08-21 12:39:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:39:01,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:39:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:02,015 INFO L225 Difference]: With dead ends: 10235 [2021-08-21 12:39:02,016 INFO L226 Difference]: Without dead ends: 10235 [2021-08-21 12:39:02,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:39:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-08-21 12:39:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 4372. [2021-08-21 12:39:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.153511782200869) internal successors, (18155), 4371 states have internal predecessors, (18155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 18155 transitions. [2021-08-21 12:39:02,278 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 18155 transitions. Word has length 32 [2021-08-21 12:39:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:02,278 INFO L470 AbstractCegarLoop]: Abstraction has 4372 states and 18155 transitions. [2021-08-21 12:39:02,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 18155 transitions. [2021-08-21 12:39:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:02,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:02,293 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:02,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:02,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:02,518 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:02,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1759037843, now seen corresponding path program 1 times [2021-08-21 12:39:02,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:02,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043077264] [2021-08-21 12:39:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:02,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:39:02,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:02,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043077264] [2021-08-21 12:39:02,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043077264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:02,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901523586] [2021-08-21 12:39:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:02,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:02,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:02,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:02,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:39:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:02,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:39:02,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:39:02,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901523586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:02,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:02,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-21 12:39:02,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551992372] [2021-08-21 12:39:02,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:39:02,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:02,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:39:02,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:39:02,984 INFO L87 Difference]: Start difference. First operand 4372 states and 18155 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:03,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:03,158 INFO L93 Difference]: Finished difference Result 8631 states and 35204 transitions. [2021-08-21 12:39:03,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:39:03,159 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:39:03,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:03,203 INFO L225 Difference]: With dead ends: 8631 [2021-08-21 12:39:03,203 INFO L226 Difference]: Without dead ends: 8631 [2021-08-21 12:39:03,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:39:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8631 states. [2021-08-21 12:39:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8631 to 5549. [2021-08-21 12:39:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 4.195385724585436) internal successors, (23276), 5548 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 23276 transitions. [2021-08-21 12:39:03,475 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 23276 transitions. Word has length 32 [2021-08-21 12:39:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:03,476 INFO L470 AbstractCegarLoop]: Abstraction has 5549 states and 23276 transitions. [2021-08-21 12:39:03,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 23276 transitions. [2021-08-21 12:39:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:03,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:03,497 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:03,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:03,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:03,722 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash 146684591, now seen corresponding path program 4 times [2021-08-21 12:39:03,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:03,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971956928] [2021-08-21 12:39:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:03,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:03,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:03,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971956928] [2021-08-21 12:39:03,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971956928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:03,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508730419] [2021-08-21 12:39:03,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:39:03,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:03,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:03,787 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:03,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:39:03,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:39:03,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:03,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:39:03,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:04,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508730419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:04,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:04,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:39:04,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133053314] [2021-08-21 12:39:04,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:39:04,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:04,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:39:04,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:39:04,215 INFO L87 Difference]: Start difference. First operand 5549 states and 23276 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:04,654 INFO L93 Difference]: Finished difference Result 15361 states and 62588 transitions. [2021-08-21 12:39:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:39:04,655 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:39:04,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:04,821 INFO L225 Difference]: With dead ends: 15361 [2021-08-21 12:39:04,821 INFO L226 Difference]: Without dead ends: 15091 [2021-08-21 12:39:04,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:39:04,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-08-21 12:39:05,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 8451. [2021-08-21 12:39:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.295739644970414) internal successors, (36299), 8450 states have internal predecessors, (36299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 36299 transitions. [2021-08-21 12:39:05,352 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 36299 transitions. Word has length 32 [2021-08-21 12:39:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:05,353 INFO L470 AbstractCegarLoop]: Abstraction has 8451 states and 36299 transitions. [2021-08-21 12:39:05,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 36299 transitions. [2021-08-21 12:39:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:05,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:05,378 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:05,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:05,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 12:39:05,583 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:05,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1750324885, now seen corresponding path program 1 times [2021-08-21 12:39:05,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:05,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091607097] [2021-08-21 12:39:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:05,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:39:05,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:05,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091607097] [2021-08-21 12:39:05,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091607097] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:39:05,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:39:05,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 12:39:05,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147848784] [2021-08-21 12:39:05,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:39:05,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:05,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:39:05,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:39:05,696 INFO L87 Difference]: Start difference. First operand 8451 states and 36299 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-08-21 12:39:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:05,878 INFO L93 Difference]: Finished difference Result 11634 states and 49174 transitions. [2021-08-21 12:39:05,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:39:05,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2021-08-21 12:39:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:05,938 INFO L225 Difference]: With dead ends: 11634 [2021-08-21 12:39:05,938 INFO L226 Difference]: Without dead ends: 11496 [2021-08-21 12:39:05,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:39:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-08-21 12:39:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9206. [2021-08-21 12:39:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 4.329277566539924) internal successors, (39851), 9205 states have internal predecessors, (39851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 39851 transitions. [2021-08-21 12:39:06,336 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 39851 transitions. Word has length 32 [2021-08-21 12:39:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:06,336 INFO L470 AbstractCegarLoop]: Abstraction has 9206 states and 39851 transitions. [2021-08-21 12:39:06,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-08-21 12:39:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 39851 transitions. [2021-08-21 12:39:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:06,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:06,365 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:06,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 12:39:06,365 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash -431820821, now seen corresponding path program 2 times [2021-08-21 12:39:06,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:06,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92404929] [2021-08-21 12:39:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:06,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:39:06,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:06,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92404929] [2021-08-21 12:39:06,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92404929] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:39:06,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:39:06,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 12:39:06,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420656262] [2021-08-21 12:39:06,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:39:06,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:06,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:39:06,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:39:06,419 INFO L87 Difference]: Start difference. First operand 9206 states and 39851 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-08-21 12:39:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:06,552 INFO L93 Difference]: Finished difference Result 10977 states and 46247 transitions. [2021-08-21 12:39:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:39:06,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2021-08-21 12:39:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:06,709 INFO L225 Difference]: With dead ends: 10977 [2021-08-21 12:39:06,709 INFO L226 Difference]: Without dead ends: 10950 [2021-08-21 12:39:06,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:39:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-08-21 12:39:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9177. [2021-08-21 12:39:07,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9176 states have (on average 4.283129904097646) internal successors, (39302), 9176 states have internal predecessors, (39302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 39302 transitions. [2021-08-21 12:39:07,168 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 39302 transitions. Word has length 32 [2021-08-21 12:39:07,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:07,169 INFO L470 AbstractCegarLoop]: Abstraction has 9177 states and 39302 transitions. [2021-08-21 12:39:07,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-08-21 12:39:07,169 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 39302 transitions. [2021-08-21 12:39:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:07,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:07,193 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:07,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 12:39:07,194 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:07,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:07,194 INFO L82 PathProgramCache]: Analyzing trace with hash -77046865, now seen corresponding path program 2 times [2021-08-21 12:39:07,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:07,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36285409] [2021-08-21 12:39:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:07,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:39:07,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:07,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36285409] [2021-08-21 12:39:07,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36285409] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:39:07,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:39:07,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 12:39:07,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483017460] [2021-08-21 12:39:07,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:39:07,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:07,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:39:07,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:39:07,246 INFO L87 Difference]: Start difference. First operand 9177 states and 39302 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-08-21 12:39:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:07,468 INFO L93 Difference]: Finished difference Result 11062 states and 46211 transitions. [2021-08-21 12:39:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:39:07,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2021-08-21 12:39:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:07,503 INFO L225 Difference]: With dead ends: 11062 [2021-08-21 12:39:07,503 INFO L226 Difference]: Without dead ends: 11002 [2021-08-21 12:39:07,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:39:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-08-21 12:39:07,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 9261. [2021-08-21 12:39:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.27645788336933) internal successors, (39600), 9260 states have internal predecessors, (39600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:07,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 39600 transitions. [2021-08-21 12:39:07,860 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 39600 transitions. Word has length 32 [2021-08-21 12:39:07,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:07,860 INFO L470 AbstractCegarLoop]: Abstraction has 9261 states and 39600 transitions. [2021-08-21 12:39:07,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-08-21 12:39:07,860 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 39600 transitions. [2021-08-21 12:39:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:07,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:07,888 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:07,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 12:39:07,889 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1662113073, now seen corresponding path program 5 times [2021-08-21 12:39:07,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:07,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317691780] [2021-08-21 12:39:07,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:07,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:07,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:07,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317691780] [2021-08-21 12:39:07,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317691780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:07,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597485051] [2021-08-21 12:39:07,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:39:07,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:07,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:07,981 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:07,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:39:08,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:39:08,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:08,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:39:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:08,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597485051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:08,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:08,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-21 12:39:08,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341949672] [2021-08-21 12:39:08,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:39:08,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:08,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:39:08,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:39:08,504 INFO L87 Difference]: Start difference. First operand 9261 states and 39600 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-08-21 12:39:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:08,997 INFO L93 Difference]: Finished difference Result 17289 states and 70842 transitions. [2021-08-21 12:39:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:39:08,998 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) Word has length 32 [2021-08-21 12:39:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:09,065 INFO L225 Difference]: With dead ends: 17289 [2021-08-21 12:39:09,065 INFO L226 Difference]: Without dead ends: 17289 [2021-08-21 12:39:09,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:39:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-08-21 12:39:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 10772. [2021-08-21 12:39:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10771 states have (on average 4.3019218271284005) internal successors, (46336), 10771 states have internal predecessors, (46336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 46336 transitions. [2021-08-21 12:39:09,504 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 46336 transitions. Word has length 32 [2021-08-21 12:39:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:09,505 INFO L470 AbstractCegarLoop]: Abstraction has 10772 states and 46336 transitions. [2021-08-21 12:39:09,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-08-21 12:39:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 46336 transitions. [2021-08-21 12:39:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:09,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:09,530 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:09,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:09,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:09,739 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1014210421, now seen corresponding path program 6 times [2021-08-21 12:39:09,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:09,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456359066] [2021-08-21 12:39:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:09,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:09,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:09,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456359066] [2021-08-21 12:39:09,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456359066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:09,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409004409] [2021-08-21 12:39:09,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:39:09,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:09,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:09,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:09,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:39:10,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:39:10,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:10,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:39:10,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:10,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409004409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:10,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:10,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-21 12:39:10,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883913592] [2021-08-21 12:39:10,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:39:10,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:39:10,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:39:10,391 INFO L87 Difference]: Start difference. First operand 10772 states and 46336 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-08-21 12:39:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:10,780 INFO L93 Difference]: Finished difference Result 17283 states and 70897 transitions. [2021-08-21 12:39:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:39:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) Word has length 32 [2021-08-21 12:39:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:10,833 INFO L225 Difference]: With dead ends: 17283 [2021-08-21 12:39:10,833 INFO L226 Difference]: Without dead ends: 17145 [2021-08-21 12:39:10,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:39:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-08-21 12:39:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 10795. [2021-08-21 12:39:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 10794 states have (on average 4.285158421345192) internal successors, (46254), 10794 states have internal predecessors, (46254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 46254 transitions. [2021-08-21 12:39:11,204 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 46254 transitions. Word has length 32 [2021-08-21 12:39:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:11,205 INFO L470 AbstractCegarLoop]: Abstraction has 10795 states and 46254 transitions. [2021-08-21 12:39:11,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-08-21 12:39:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 46254 transitions. [2021-08-21 12:39:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:11,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:11,229 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:11,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-21 12:39:11,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:11,435 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash -237310289, now seen corresponding path program 7 times [2021-08-21 12:39:11,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:11,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199921248] [2021-08-21 12:39:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:11,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:39:11,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:11,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199921248] [2021-08-21 12:39:11,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199921248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:11,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660596569] [2021-08-21 12:39:11,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:39:11,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:11,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:11,504 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:11,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:39:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:11,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:39:11,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:12,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660596569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:12,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:12,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:39:12,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319817132] [2021-08-21 12:39:12,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:39:12,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:39:12,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:39:12,015 INFO L87 Difference]: Start difference. First operand 10795 states and 46254 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:12,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:12,569 INFO L93 Difference]: Finished difference Result 26096 states and 108482 transitions. [2021-08-21 12:39:12,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:39:12,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:39:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:12,678 INFO L225 Difference]: With dead ends: 26096 [2021-08-21 12:39:12,678 INFO L226 Difference]: Without dead ends: 26096 [2021-08-21 12:39:12,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:39:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26096 states. [2021-08-21 12:39:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26096 to 14993. [2021-08-21 12:39:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14993 states, 14992 states have (on average 4.368729989327641) internal successors, (65496), 14992 states have internal predecessors, (65496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 65496 transitions. [2021-08-21 12:39:13,299 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 65496 transitions. Word has length 32 [2021-08-21 12:39:13,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:13,299 INFO L470 AbstractCegarLoop]: Abstraction has 14993 states and 65496 transitions. [2021-08-21 12:39:13,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 65496 transitions. [2021-08-21 12:39:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:13,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:13,337 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:13,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:13,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:39:13,538 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:13,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:13,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1931533901, now seen corresponding path program 8 times [2021-08-21 12:39:13,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:13,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292140160] [2021-08-21 12:39:13,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:13,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:39:13,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:13,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292140160] [2021-08-21 12:39:13,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292140160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:13,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685189406] [2021-08-21 12:39:13,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:39:13,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:13,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:13,606 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:13,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:39:13,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:39:13,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:13,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:39:13,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:14,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685189406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:14,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:14,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-21 12:39:14,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031671748] [2021-08-21 12:39:14,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:39:14,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:14,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:39:14,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:39:14,135 INFO L87 Difference]: Start difference. First operand 14993 states and 65496 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:14,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:14,519 INFO L93 Difference]: Finished difference Result 19071 states and 81167 transitions. [2021-08-21 12:39:14,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:39:14,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:39:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:14,606 INFO L225 Difference]: With dead ends: 19071 [2021-08-21 12:39:14,606 INFO L226 Difference]: Without dead ends: 19009 [2021-08-21 12:39:14,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:39:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2021-08-21 12:39:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15495. [2021-08-21 12:39:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15495 states, 15494 states have (on average 4.3805344004130635) internal successors, (67872), 15494 states have internal predecessors, (67872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15495 states to 15495 states and 67872 transitions. [2021-08-21 12:39:15,121 INFO L78 Accepts]: Start accepts. Automaton has 15495 states and 67872 transitions. Word has length 32 [2021-08-21 12:39:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:15,121 INFO L470 AbstractCegarLoop]: Abstraction has 15495 states and 67872 transitions. [2021-08-21 12:39:15,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 15495 states and 67872 transitions. [2021-08-21 12:39:15,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:15,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:15,158 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:15,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:15,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 12:39:15,362 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1018081403, now seen corresponding path program 9 times [2021-08-21 12:39:15,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:15,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296062494] [2021-08-21 12:39:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:15,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:39:15,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:15,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296062494] [2021-08-21 12:39:15,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296062494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:15,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658428556] [2021-08-21 12:39:15,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:39:15,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:15,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:15,432 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:15,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:39:15,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:39:15,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:15,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:39:15,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:15,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658428556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:15,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:15,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-21 12:39:15,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231549068] [2021-08-21 12:39:15,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:39:15,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:39:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:39:15,912 INFO L87 Difference]: Start difference. First operand 15495 states and 67872 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-08-21 12:39:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:16,483 INFO L93 Difference]: Finished difference Result 25596 states and 106759 transitions. [2021-08-21 12:39:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:39:16,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) Word has length 32 [2021-08-21 12:39:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:16,575 INFO L225 Difference]: With dead ends: 25596 [2021-08-21 12:39:16,575 INFO L226 Difference]: Without dead ends: 25518 [2021-08-21 12:39:16,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:39:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25518 states. [2021-08-21 12:39:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25518 to 15518. [2021-08-21 12:39:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15518 states, 15517 states have (on average 4.374299155764645) internal successors, (67876), 15517 states have internal predecessors, (67876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15518 states to 15518 states and 67876 transitions. [2021-08-21 12:39:17,244 INFO L78 Accepts]: Start accepts. Automaton has 15518 states and 67876 transitions. Word has length 32 [2021-08-21 12:39:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:17,244 INFO L470 AbstractCegarLoop]: Abstraction has 15518 states and 67876 transitions. [2021-08-21 12:39:17,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-08-21 12:39:17,245 INFO L276 IsEmpty]: Start isEmpty. Operand 15518 states and 67876 transitions. [2021-08-21 12:39:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:39:17,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:17,292 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:17,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:17,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:39:17,502 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:17,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:17,502 INFO L82 PathProgramCache]: Analyzing trace with hash 188789747, now seen corresponding path program 10 times [2021-08-21 12:39:17,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:17,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409500329] [2021-08-21 12:39:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:17,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:17,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:17,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409500329] [2021-08-21 12:39:17,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409500329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:17,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351853459] [2021-08-21 12:39:17,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:39:17,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:17,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:17,569 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:17,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:39:17,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:39:17,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:17,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:39:17,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:18,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351853459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:18,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:18,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:39:18,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971121731] [2021-08-21 12:39:18,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:39:18,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:18,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:39:18,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:39:18,115 INFO L87 Difference]: Start difference. First operand 15518 states and 67876 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2021-08-21 12:39:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:18,742 INFO L93 Difference]: Finished difference Result 25214 states and 104840 transitions. [2021-08-21 12:39:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:39:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) Word has length 32 [2021-08-21 12:39:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:18,836 INFO L225 Difference]: With dead ends: 25214 [2021-08-21 12:39:18,837 INFO L226 Difference]: Without dead ends: 25094 [2021-08-21 12:39:18,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:39:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25094 states. [2021-08-21 12:39:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25094 to 16132. [2021-08-21 12:39:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16132 states, 16131 states have (on average 4.372140598846941) internal successors, (70527), 16131 states have internal predecessors, (70527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 70527 transitions. [2021-08-21 12:39:19,406 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 70527 transitions. Word has length 32 [2021-08-21 12:39:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:19,406 INFO L470 AbstractCegarLoop]: Abstraction has 16132 states and 70527 transitions. [2021-08-21 12:39:19,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2021-08-21 12:39:19,407 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 70527 transitions. [2021-08-21 12:39:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:39:19,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:19,444 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:19,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-21 12:39:19,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:19,644 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash -222345683, now seen corresponding path program 11 times [2021-08-21 12:39:19,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:19,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198386502] [2021-08-21 12:39:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:19,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:19,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:19,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198386502] [2021-08-21 12:39:19,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198386502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:19,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914702880] [2021-08-21 12:39:19,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:39:19,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:19,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:19,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:19,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:39:20,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:39:20,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:20,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:39:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:20,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914702880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:20,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:20,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-08-21 12:39:20,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103375341] [2021-08-21 12:39:20,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:39:20,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:20,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:39:20,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:39:20,579 INFO L87 Difference]: Start difference. First operand 16132 states and 70527 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:20,860 INFO L93 Difference]: Finished difference Result 30028 states and 127196 transitions. [2021-08-21 12:39:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:39:20,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:39:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:20,981 INFO L225 Difference]: With dead ends: 30028 [2021-08-21 12:39:20,981 INFO L226 Difference]: Without dead ends: 29440 [2021-08-21 12:39:20,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:39:21,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29440 states. [2021-08-21 12:39:21,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29440 to 21834. [2021-08-21 12:39:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 4.3858379517244535) internal successors, (95756), 21833 states have internal predecessors, (95756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 95756 transitions. [2021-08-21 12:39:21,954 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 95756 transitions. Word has length 34 [2021-08-21 12:39:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:21,955 INFO L470 AbstractCegarLoop]: Abstraction has 21834 states and 95756 transitions. [2021-08-21 12:39:21,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 95756 transitions. [2021-08-21 12:39:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:39:22,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:22,009 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:22,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:22,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:22,210 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:22,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:22,211 INFO L82 PathProgramCache]: Analyzing trace with hash -911583255, now seen corresponding path program 12 times [2021-08-21 12:39:22,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:22,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839264958] [2021-08-21 12:39:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:22,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:39:22,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:22,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839264958] [2021-08-21 12:39:22,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839264958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:22,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251417322] [2021-08-21 12:39:22,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:39:22,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:22,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:22,287 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:22,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:39:22,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:39:22,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:22,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:39:22,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:22,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251417322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:22,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:22,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-08-21 12:39:22,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706319480] [2021-08-21 12:39:22,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:39:22,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:22,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:39:22,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:39:22,988 INFO L87 Difference]: Start difference. First operand 21834 states and 95756 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:23,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:23,659 INFO L93 Difference]: Finished difference Result 60940 states and 262767 transitions. [2021-08-21 12:39:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:39:23,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:39:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:24,182 INFO L225 Difference]: With dead ends: 60940 [2021-08-21 12:39:24,183 INFO L226 Difference]: Without dead ends: 58958 [2021-08-21 12:39:24,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:39:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2021-08-21 12:39:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 39850. [2021-08-21 12:39:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39850 states, 39849 states have (on average 4.48199452934829) internal successors, (178603), 39849 states have internal predecessors, (178603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39850 states to 39850 states and 178603 transitions. [2021-08-21 12:39:26,054 INFO L78 Accepts]: Start accepts. Automaton has 39850 states and 178603 transitions. Word has length 34 [2021-08-21 12:39:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:26,055 INFO L470 AbstractCegarLoop]: Abstraction has 39850 states and 178603 transitions. [2021-08-21 12:39:26,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 39850 states and 178603 transitions. [2021-08-21 12:39:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:39:26,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:26,469 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:26,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:26,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-21 12:39:26,685 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2078759021, now seen corresponding path program 13 times [2021-08-21 12:39:26,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:26,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824743002] [2021-08-21 12:39:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:26,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:39:26,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:26,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824743002] [2021-08-21 12:39:26,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824743002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:26,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251015591] [2021-08-21 12:39:26,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:39:26,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:26,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:26,752 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:26,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:39:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:27,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:39:27,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:27,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251015591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:27,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:27,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-08-21 12:39:27,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481130935] [2021-08-21 12:39:27,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:39:27,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:27,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:39:27,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:39:27,586 INFO L87 Difference]: Start difference. First operand 39850 states and 178603 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:28,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:28,363 INFO L93 Difference]: Finished difference Result 60941 states and 268418 transitions. [2021-08-21 12:39:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:39:28,363 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:39:28,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:28,713 INFO L225 Difference]: With dead ends: 60941 [2021-08-21 12:39:28,713 INFO L226 Difference]: Without dead ends: 60279 [2021-08-21 12:39:28,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:39:28,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60279 states. [2021-08-21 12:39:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60279 to 54948. [2021-08-21 12:39:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54948 states, 54947 states have (on average 4.507143247129052) internal successors, (247654), 54947 states have internal predecessors, (247654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 247654 transitions. [2021-08-21 12:39:31,143 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 247654 transitions. Word has length 34 [2021-08-21 12:39:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:31,143 INFO L470 AbstractCegarLoop]: Abstraction has 54948 states and 247654 transitions. [2021-08-21 12:39:31,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 247654 transitions. [2021-08-21 12:39:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:39:31,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:31,288 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:31,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:31,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:31,489 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1621846571, now seen corresponding path program 14 times [2021-08-21 12:39:31,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:31,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456581421] [2021-08-21 12:39:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:31,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:31,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:31,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456581421] [2021-08-21 12:39:31,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456581421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:31,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955908841] [2021-08-21 12:39:31,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:39:31,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:31,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:31,875 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:31,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:39:32,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:39:32,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:32,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:39:32,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:32,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955908841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:32,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:32,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:39:32,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881104046] [2021-08-21 12:39:32,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:39:32,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:32,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:39:32,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:39:32,612 INFO L87 Difference]: Start difference. First operand 54948 states and 247654 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:34,126 INFO L93 Difference]: Finished difference Result 115835 states and 498368 transitions. [2021-08-21 12:39:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:39:34,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:39:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:35,110 INFO L225 Difference]: With dead ends: 115835 [2021-08-21 12:39:35,110 INFO L226 Difference]: Without dead ends: 115835 [2021-08-21 12:39:35,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 728.1ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:39:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115835 states. [2021-08-21 12:39:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115835 to 56994. [2021-08-21 12:39:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56994 states, 56993 states have (on average 4.487621286824698) internal successors, (255763), 56993 states have internal predecessors, (255763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56994 states to 56994 states and 255763 transitions. [2021-08-21 12:39:38,290 INFO L78 Accepts]: Start accepts. Automaton has 56994 states and 255763 transitions. Word has length 36 [2021-08-21 12:39:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:38,290 INFO L470 AbstractCegarLoop]: Abstraction has 56994 states and 255763 transitions. [2021-08-21 12:39:38,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 56994 states and 255763 transitions. [2021-08-21 12:39:38,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:39:38,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:38,812 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:38,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:39,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:39,025 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:39,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:39,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2043305711, now seen corresponding path program 15 times [2021-08-21 12:39:39,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:39,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059789747] [2021-08-21 12:39:39,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:39,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:39,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:39,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059789747] [2021-08-21 12:39:39,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059789747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:39,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789205399] [2021-08-21 12:39:39,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:39:39,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:39,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:39,109 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:39,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:39:39,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:39:39,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:39,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:39:39,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:39,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789205399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:39,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:39,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:39:39,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926174428] [2021-08-21 12:39:39,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:39:39,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:39,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:39:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:39:39,881 INFO L87 Difference]: Start difference. First operand 56994 states and 255763 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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) [2021-08-21 12:39:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:42,189 INFO L93 Difference]: Finished difference Result 148781 states and 646238 transitions. [2021-08-21 12:39:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:39:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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) Word has length 36 [2021-08-21 12:39:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:43,063 INFO L225 Difference]: With dead ends: 148781 [2021-08-21 12:39:43,064 INFO L226 Difference]: Without dead ends: 147463 [2021-08-21 12:39:43,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 662.1ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:39:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2021-08-21 12:39:47,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 80557. [2021-08-21 12:39:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80557 states, 80556 states have (on average 4.52723571180297) internal successors, (364696), 80556 states have internal predecessors, (364696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80557 states to 80557 states and 364696 transitions. [2021-08-21 12:39:48,067 INFO L78 Accepts]: Start accepts. Automaton has 80557 states and 364696 transitions. Word has length 36 [2021-08-21 12:39:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:48,067 INFO L470 AbstractCegarLoop]: Abstraction has 80557 states and 364696 transitions. [2021-08-21 12:39:48,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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) [2021-08-21 12:39:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 80557 states and 364696 transitions. [2021-08-21 12:39:48,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:39:48,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:48,728 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:48,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:48,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 12:39:48,929 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:39:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:48,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1708986033, now seen corresponding path program 16 times [2021-08-21 12:39:48,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:48,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960840456] [2021-08-21 12:39:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:48,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:48,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:48,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960840456] [2021-08-21 12:39:48,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960840456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:48,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476569483] [2021-08-21 12:39:48,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:39:48,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:48,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:49,000 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:49,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:39:49,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:39:49,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:39:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:49,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476569483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:49,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:49,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-08-21 12:39:49,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999870940] [2021-08-21 12:39:49,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:39:49,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:39:49,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:39:49,718 INFO L87 Difference]: Start difference. First operand 80557 states and 364696 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:52,257 INFO L93 Difference]: Finished difference Result 170107 states and 749961 transitions. [2021-08-21 12:39:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:39:52,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:39:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:53,706 INFO L225 Difference]: With dead ends: 170107 [2021-08-21 12:39:53,706 INFO L226 Difference]: Without dead ends: 170087 [2021-08-21 12:39:53,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 616.9ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:39:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170087 states. [2021-08-21 12:39:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170087 to 102149. [2021-08-21 12:39:59,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102149 states, 102148 states have (on average 4.5491933273289735) internal successors, (464691), 102148 states have internal predecessors, (464691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102149 states to 102149 states and 464691 transitions. [2021-08-21 12:40:00,365 INFO L78 Accepts]: Start accepts. Automaton has 102149 states and 464691 transitions. Word has length 36 [2021-08-21 12:40:00,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:00,365 INFO L470 AbstractCegarLoop]: Abstraction has 102149 states and 464691 transitions. [2021-08-21 12:40:00,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 102149 states and 464691 transitions. [2021-08-21 12:40:00,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:00,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:00,886 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:00,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-21 12:40:01,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:01,110 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:40:01,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:01,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1061083381, now seen corresponding path program 17 times [2021-08-21 12:40:01,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:01,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847013545] [2021-08-21 12:40:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:01,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:01,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:01,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847013545] [2021-08-21 12:40:01,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847013545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:01,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791747806] [2021-08-21 12:40:01,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:40:01,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:01,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:01,224 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:40:01,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:40:01,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:40:01,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:01,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:40:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:02,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791747806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:02,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:02,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-08-21 12:40:02,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211900890] [2021-08-21 12:40:02,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:40:02,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:02,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:40:02,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:40:02,394 INFO L87 Difference]: Start difference. First operand 102149 states and 464691 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:05,052 INFO L93 Difference]: Finished difference Result 140554 states and 618093 transitions. [2021-08-21 12:40:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:40:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:05,964 INFO L225 Difference]: With dead ends: 140554 [2021-08-21 12:40:05,964 INFO L226 Difference]: Without dead ends: 140250 [2021-08-21 12:40:05,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:40:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140250 states. [2021-08-21 12:40:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140250 to 98725. [2021-08-21 12:40:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98725 states, 98724 states have (on average 4.555366476236781) internal successors, (449724), 98724 states have internal predecessors, (449724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98725 states to 98725 states and 449724 transitions. [2021-08-21 12:40:11,444 INFO L78 Accepts]: Start accepts. Automaton has 98725 states and 449724 transitions. Word has length 36 [2021-08-21 12:40:11,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:11,444 INFO L470 AbstractCegarLoop]: Abstraction has 98725 states and 449724 transitions. [2021-08-21 12:40:11,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 98725 states and 449724 transitions. [2021-08-21 12:40:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:11,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:11,706 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:11,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:40:11,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:11,907 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:40:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:11,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1796828169, now seen corresponding path program 18 times [2021-08-21 12:40:11,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:11,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807606138] [2021-08-21 12:40:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:11,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:40:11,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:11,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807606138] [2021-08-21 12:40:11,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807606138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:11,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656633930] [2021-08-21 12:40:11,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:40:11,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:11,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:11,979 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:40:11,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:40:12,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:40:12,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:12,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:40:12,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:13,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656633930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:13,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:13,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-08-21 12:40:13,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862284139] [2021-08-21 12:40:13,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:40:13,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:40:13,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:40:13,154 INFO L87 Difference]: Start difference. First operand 98725 states and 449724 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:15,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:15,097 INFO L93 Difference]: Finished difference Result 157433 states and 697584 transitions. [2021-08-21 12:40:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:40:15,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:16,557 INFO L225 Difference]: With dead ends: 157433 [2021-08-21 12:40:16,557 INFO L226 Difference]: Without dead ends: 156538 [2021-08-21 12:40:16,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:40:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156538 states. [2021-08-21 12:40:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156538 to 110101. [2021-08-21 12:40:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110101 states, 110100 states have (on average 4.5832970027247955) internal successors, (504621), 110100 states have internal predecessors, (504621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110101 states to 110101 states and 504621 transitions. [2021-08-21 12:40:22,858 INFO L78 Accepts]: Start accepts. Automaton has 110101 states and 504621 transitions. Word has length 36 [2021-08-21 12:40:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:22,858 INFO L470 AbstractCegarLoop]: Abstraction has 110101 states and 504621 transitions. [2021-08-21 12:40:22,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 110101 states and 504621 transitions. [2021-08-21 12:40:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:23,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:23,135 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:23,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-21 12:40:23,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:23,337 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:40:23,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:23,337 INFO L82 PathProgramCache]: Analyzing trace with hash 54084015, now seen corresponding path program 19 times [2021-08-21 12:40:23,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:23,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110250235] [2021-08-21 12:40:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:23,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:23,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:23,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110250235] [2021-08-21 12:40:23,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110250235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:23,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081573398] [2021-08-21 12:40:23,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:40:23,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:23,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:23,410 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:40:23,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:40:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:40:24,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:24,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081573398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:24,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:24,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:40:24,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645637222] [2021-08-21 12:40:24,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:40:24,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:24,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:40:24,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:40:24,543 INFO L87 Difference]: Start difference. First operand 110101 states and 504621 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:27,386 INFO L93 Difference]: Finished difference Result 192417 states and 850027 transitions. [2021-08-21 12:40:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:40:27,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:27,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:28,654 INFO L225 Difference]: With dead ends: 192417 [2021-08-21 12:40:28,654 INFO L226 Difference]: Without dead ends: 191725 [2021-08-21 12:40:28,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 456.8ms TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:40:29,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191725 states. [2021-08-21 12:40:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191725 to 118442. [2021-08-21 12:40:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118442 states, 118441 states have (on average 4.604208002296502) internal successors, (545327), 118441 states have internal predecessors, (545327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118442 states to 118442 states and 545327 transitions. [2021-08-21 12:40:37,394 INFO L78 Accepts]: Start accepts. Automaton has 118442 states and 545327 transitions. Word has length 36 [2021-08-21 12:40:37,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:37,395 INFO L470 AbstractCegarLoop]: Abstraction has 118442 states and 545327 transitions. [2021-08-21 12:40:37,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 118442 states and 545327 transitions. [2021-08-21 12:40:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:38,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:38,337 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:38,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:40:38,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:40:38,563 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:40:38,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:38,563 INFO L82 PathProgramCache]: Analyzing trace with hash 40319953, now seen corresponding path program 20 times [2021-08-21 12:40:38,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:38,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672736059] [2021-08-21 12:40:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:38,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:40:38,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:38,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672736059] [2021-08-21 12:40:38,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672736059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:38,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010986878] [2021-08-21 12:40:38,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:40:38,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:38,732 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:40:38,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:40:39,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:40:39,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:39,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:40:39,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:39,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010986878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:39,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:39,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:40:39,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491502995] [2021-08-21 12:40:39,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:40:39,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:39,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:40:39,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:40:39,691 INFO L87 Difference]: Start difference. First operand 118442 states and 545327 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:42,744 INFO L93 Difference]: Finished difference Result 221192 states and 968042 transitions. [2021-08-21 12:40:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:40:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:44,672 INFO L225 Difference]: With dead ends: 221192 [2021-08-21 12:40:44,672 INFO L226 Difference]: Without dead ends: 221192 [2021-08-21 12:40:44,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 560.1ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:40:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221192 states. [2021-08-21 12:40:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221192 to 115584. [2021-08-21 12:40:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115584 states, 115583 states have (on average 4.562331830805569) internal successors, (527328), 115583 states have internal predecessors, (527328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 527328 transitions. [2021-08-21 12:40:53,133 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 527328 transitions. Word has length 36 [2021-08-21 12:40:53,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:53,133 INFO L470 AbstractCegarLoop]: Abstraction has 115584 states and 527328 transitions. [2021-08-21 12:40:53,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 527328 transitions. [2021-08-21 12:40:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:40:53,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:53,823 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:53,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 12:40:54,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 12:40:54,023 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:40:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash 554582417, now seen corresponding path program 21 times [2021-08-21 12:40:54,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:54,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388697531] [2021-08-21 12:40:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:54,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:40:54,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:54,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388697531] [2021-08-21 12:40:54,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388697531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:54,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994493742] [2021-08-21 12:40:54,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:40:54,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:54,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:54,125 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:40:54,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:40:54,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:40:54,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:54,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:40:54,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:55,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994493742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:55,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:55,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:40:55,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571592746] [2021-08-21 12:40:55,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:40:55,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:55,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:40:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:40:55,033 INFO L87 Difference]: Start difference. First operand 115584 states and 527328 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:57,036 INFO L93 Difference]: Finished difference Result 149434 states and 659887 transitions. [2021-08-21 12:40:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:40:57,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:40:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:58,396 INFO L225 Difference]: With dead ends: 149434 [2021-08-21 12:40:58,396 INFO L226 Difference]: Without dead ends: 149030 [2021-08-21 12:40:58,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 516.3ms TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:40:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149030 states. [2021-08-21 12:41:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149030 to 114434. [2021-08-21 12:41:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114434 states, 114433 states have (on average 4.564548687878497) internal successors, (522335), 114433 states have internal predecessors, (522335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114434 states to 114434 states and 522335 transitions. [2021-08-21 12:41:04,070 INFO L78 Accepts]: Start accepts. Automaton has 114434 states and 522335 transitions. Word has length 36 [2021-08-21 12:41:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:04,070 INFO L470 AbstractCegarLoop]: Abstraction has 114434 states and 522335 transitions. [2021-08-21 12:41:04,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 114434 states and 522335 transitions. [2021-08-21 12:41:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:04,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:04,819 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:04,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:41:05,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:05,021 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:41:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:05,021 INFO L82 PathProgramCache]: Analyzing trace with hash 13790191, now seen corresponding path program 22 times [2021-08-21 12:41:05,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:05,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775804562] [2021-08-21 12:41:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:05,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:41:05,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:05,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775804562] [2021-08-21 12:41:05,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775804562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:05,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638397880] [2021-08-21 12:41:05,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:41:05,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:05,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:05,100 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:41:05,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:41:05,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:41:05,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:05,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:41:05,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:06,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638397880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:06,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:06,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:41:06,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042570758] [2021-08-21 12:41:06,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:41:06,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:06,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:41:06,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:41:06,145 INFO L87 Difference]: Start difference. First operand 114434 states and 522335 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:10,851 INFO L93 Difference]: Finished difference Result 262218 states and 1170693 transitions. [2021-08-21 12:41:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:41:10,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:10,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:13,139 INFO L225 Difference]: With dead ends: 262218 [2021-08-21 12:41:13,139 INFO L226 Difference]: Without dead ends: 262218 [2021-08-21 12:41:13,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:41:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262218 states. [2021-08-21 12:41:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262218 to 187390. [2021-08-21 12:41:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187390 states, 187389 states have (on average 4.617053295550966) internal successors, (865185), 187389 states have internal predecessors, (865185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187390 states to 187390 states and 865185 transitions. [2021-08-21 12:41:25,896 INFO L78 Accepts]: Start accepts. Automaton has 187390 states and 865185 transitions. Word has length 36 [2021-08-21 12:41:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:25,896 INFO L470 AbstractCegarLoop]: Abstraction has 187390 states and 865185 transitions. [2021-08-21 12:41:25,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:25,896 INFO L276 IsEmpty]: Start isEmpty. Operand 187390 states and 865185 transitions. [2021-08-21 12:41:26,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:26,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:26,777 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:26,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:41:26,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:26,981 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:41:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash -766980923, now seen corresponding path program 23 times [2021-08-21 12:41:26,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:26,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089034482] [2021-08-21 12:41:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:26,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:41:27,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:27,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089034482] [2021-08-21 12:41:27,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089034482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:27,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452726617] [2021-08-21 12:41:27,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:41:27,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:27,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:27,062 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:41:27,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:41:27,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:41:27,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:41:27,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:28,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452726617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:28,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:28,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-08-21 12:41:28,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823539765] [2021-08-21 12:41:28,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:41:28,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:28,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:41:28,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:41:28,238 INFO L87 Difference]: Start difference. First operand 187390 states and 865185 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:31,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:31,850 INFO L93 Difference]: Finished difference Result 254683 states and 1137807 transitions. [2021-08-21 12:41:31,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:41:31,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:31,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:34,158 INFO L225 Difference]: With dead ends: 254683 [2021-08-21 12:41:34,159 INFO L226 Difference]: Without dead ends: 254373 [2021-08-21 12:41:34,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:41:34,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254373 states. [2021-08-21 12:41:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254373 to 187000. [2021-08-21 12:41:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187000 states, 186999 states have (on average 4.611853539323739) internal successors, (862412), 186999 states have internal predecessors, (862412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187000 states to 187000 states and 862412 transitions. [2021-08-21 12:41:47,004 INFO L78 Accepts]: Start accepts. Automaton has 187000 states and 862412 transitions. Word has length 36 [2021-08-21 12:41:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:47,004 INFO L470 AbstractCegarLoop]: Abstraction has 187000 states and 862412 transitions. [2021-08-21 12:41:47,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 187000 states and 862412 transitions. [2021-08-21 12:41:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:41:47,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:47,434 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:47,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:41:47,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:47,641 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:41:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:47,641 INFO L82 PathProgramCache]: Analyzing trace with hash 439890227, now seen corresponding path program 24 times [2021-08-21 12:41:47,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:47,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691046894] [2021-08-21 12:41:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:47,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:41:47,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:47,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691046894] [2021-08-21 12:41:47,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691046894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:47,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916659898] [2021-08-21 12:41:47,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:41:47,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:47,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:47,717 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:41:47,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:41:48,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:41:48,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:48,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:41:48,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:48,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916659898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:48,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:48,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:41:48,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152010499] [2021-08-21 12:41:48,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:41:48,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:48,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:41:48,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:41:48,942 INFO L87 Difference]: Start difference. First operand 187000 states and 862412 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:54,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:54,412 INFO L93 Difference]: Finished difference Result 283294 states and 1263502 transitions. [2021-08-21 12:41:54,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:41:54,413 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:41:54,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:57,198 INFO L225 Difference]: With dead ends: 283294 [2021-08-21 12:41:57,198 INFO L226 Difference]: Without dead ends: 282784 [2021-08-21 12:41:57,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:41:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282784 states. [2021-08-21 12:42:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282784 to 207055. [2021-08-21 12:42:09,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207055 states, 207054 states have (on average 4.6254455359471445) internal successors, (957717), 207054 states have internal predecessors, (957717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207055 states to 207055 states and 957717 transitions. [2021-08-21 12:42:11,397 INFO L78 Accepts]: Start accepts. Automaton has 207055 states and 957717 transitions. Word has length 36 [2021-08-21 12:42:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:11,397 INFO L470 AbstractCegarLoop]: Abstraction has 207055 states and 957717 transitions. [2021-08-21 12:42:11,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 207055 states and 957717 transitions. [2021-08-21 12:42:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:42:12,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:12,210 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:12,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:42:12,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 12:42:12,436 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:42:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:12,436 INFO L82 PathProgramCache]: Analyzing trace with hash -381009233, now seen corresponding path program 25 times [2021-08-21 12:42:12,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:12,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759879907] [2021-08-21 12:42:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:12,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:12,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:12,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759879907] [2021-08-21 12:42:12,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759879907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:12,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780486979] [2021-08-21 12:42:12,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:42:12,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:12,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:12,511 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:42:12,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:42:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:13,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:42:13,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:13,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780486979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:13,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:13,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:42:13,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788701207] [2021-08-21 12:42:13,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:42:13,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:13,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:42:13,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:42:13,507 INFO L87 Difference]: Start difference. First operand 207055 states and 957717 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:17,938 INFO L93 Difference]: Finished difference Result 290122 states and 1295399 transitions. [2021-08-21 12:42:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:42:17,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:42:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:21,070 INFO L225 Difference]: With dead ends: 290122 [2021-08-21 12:42:21,070 INFO L226 Difference]: Without dead ends: 289652 [2021-08-21 12:42:21,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 684.9ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:42:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289652 states. [2021-08-21 12:42:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289652 to 218816. [2021-08-21 12:42:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218816 states, 218815 states have (on average 4.624737792198889) internal successors, (1011962), 218815 states have internal predecessors, (1011962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218816 states to 218816 states and 1011962 transitions. [2021-08-21 12:42:37,332 INFO L78 Accepts]: Start accepts. Automaton has 218816 states and 1011962 transitions. Word has length 36 [2021-08-21 12:42:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:37,332 INFO L470 AbstractCegarLoop]: Abstraction has 218816 states and 1011962 transitions. [2021-08-21 12:42:37,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 218816 states and 1011962 transitions. [2021-08-21 12:42:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:42:38,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:38,678 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:38,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 12:42:38,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-21 12:42:38,901 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:42:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash 490568557, now seen corresponding path program 26 times [2021-08-21 12:42:38,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:38,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180510353] [2021-08-21 12:42:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:38,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:39,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:39,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180510353] [2021-08-21 12:42:39,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180510353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:39,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563607508] [2021-08-21 12:42:39,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:42:39,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:39,089 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:42:39,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:42:40,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:42:40,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:42:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:42:40,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:40,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563607508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:40,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:40,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-08-21 12:42:40,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071538010] [2021-08-21 12:42:40,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:42:40,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:40,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:42:40,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:42:40,725 INFO L87 Difference]: Start difference. First operand 218816 states and 1011962 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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) [2021-08-21 12:42:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:45,028 INFO L93 Difference]: Finished difference Result 275767 states and 1260077 transitions. [2021-08-21 12:42:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:42:45,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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) Word has length 38 [2021-08-21 12:42:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:47,454 INFO L225 Difference]: With dead ends: 275767 [2021-08-21 12:42:47,454 INFO L226 Difference]: Without dead ends: 274998 [2021-08-21 12:42:47,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:42:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274998 states. [2021-08-21 12:43:01,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274998 to 238003. [2021-08-21 12:43:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238003 states, 238002 states have (on average 4.6232090486634565) internal successors, (1100333), 238002 states have internal predecessors, (1100333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238003 states to 238003 states and 1100333 transitions. [2021-08-21 12:43:05,207 INFO L78 Accepts]: Start accepts. Automaton has 238003 states and 1100333 transitions. Word has length 38 [2021-08-21 12:43:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:05,207 INFO L470 AbstractCegarLoop]: Abstraction has 238003 states and 1100333 transitions. [2021-08-21 12:43:05,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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) [2021-08-21 12:43:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 238003 states and 1100333 transitions. [2021-08-21 12:43:06,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:43:06,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:06,707 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:06,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:06,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-21 12:43:06,933 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:06,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:06,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2064971429, now seen corresponding path program 27 times [2021-08-21 12:43:06,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:06,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31630354] [2021-08-21 12:43:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:06,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:43:07,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:07,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31630354] [2021-08-21 12:43:07,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31630354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:07,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904306456] [2021-08-21 12:43:07,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:43:07,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:07,097 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:43:07,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:43:08,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:43:08,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:08,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:43:08,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:08,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904306456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:08,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:08,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-08-21 12:43:08,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362942406] [2021-08-21 12:43:08,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:43:08,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:08,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:43:08,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:43:08,868 INFO L87 Difference]: Start difference. First operand 238003 states and 1100333 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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) [2021-08-21 12:43:15,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:15,449 INFO L93 Difference]: Finished difference Result 394201 states and 1792824 transitions. [2021-08-21 12:43:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:43:15,465 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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) Word has length 38 [2021-08-21 12:43:15,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:22,094 INFO L225 Difference]: With dead ends: 394201 [2021-08-21 12:43:22,100 INFO L226 Difference]: Without dead ends: 392734 [2021-08-21 12:43:22,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:43:23,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392734 states. [2021-08-21 12:43:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392734 to 306278. [2021-08-21 12:43:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306278 states, 306277 states have (on average 4.624082121739471) internal successors, (1416250), 306277 states have internal predecessors, (1416250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306278 states to 306278 states and 1416250 transitions. [2021-08-21 12:43:45,858 INFO L78 Accepts]: Start accepts. Automaton has 306278 states and 1416250 transitions. Word has length 38 [2021-08-21 12:43:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:45,859 INFO L470 AbstractCegarLoop]: Abstraction has 306278 states and 1416250 transitions. [2021-08-21 12:43:45,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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) [2021-08-21 12:43:45,859 INFO L276 IsEmpty]: Start isEmpty. Operand 306278 states and 1416250 transitions. [2021-08-21 12:43:46,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:43:46,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:46,690 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:43:46,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:46,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:46,893 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:46,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:46,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1139005671, now seen corresponding path program 1 times [2021-08-21 12:43:46,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:46,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928575305] [2021-08-21 12:43:46,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:46,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:43:46,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:46,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928575305] [2021-08-21 12:43:46,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928575305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:46,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691836732] [2021-08-21 12:43:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:46,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:46,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:46,974 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:43:46,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:43:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:48,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:43:48,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:48,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691836732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:48,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:48,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-08-21 12:43:48,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952103825] [2021-08-21 12:43:48,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:43:48,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:43:48,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:43:48,482 INFO L87 Difference]: Start difference. First operand 306278 states and 1416250 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:59,916 INFO L93 Difference]: Finished difference Result 586179 states and 2672233 transitions. [2021-08-21 12:43:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:43:59,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:43:59,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:06,574 INFO L225 Difference]: With dead ends: 586179 [2021-08-21 12:44:06,574 INFO L226 Difference]: Without dead ends: 583951 [2021-08-21 12:44:06,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:44:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583951 states. [2021-08-21 12:44:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583951 to 425975. [2021-08-21 12:44:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425975 states, 425974 states have (on average 4.631465770211327) internal successors, (1972884), 425974 states have internal predecessors, (1972884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:46,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425975 states to 425975 states and 1972884 transitions. [2021-08-21 12:44:46,706 INFO L78 Accepts]: Start accepts. Automaton has 425975 states and 1972884 transitions. Word has length 38 [2021-08-21 12:44:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:46,707 INFO L470 AbstractCegarLoop]: Abstraction has 425975 states and 1972884 transitions. [2021-08-21 12:44:46,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand 425975 states and 1972884 transitions. [2021-08-21 12:44:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:44:49,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:49,374 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:49,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:44:49,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:44:49,609 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1995949741, now seen corresponding path program 28 times [2021-08-21 12:44:49,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:49,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989879862] [2021-08-21 12:44:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:49,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:44:50,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:50,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989879862] [2021-08-21 12:44:50,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989879862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:50,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046165962] [2021-08-21 12:44:50,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:44:50,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:50,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:50,385 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:44:50,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:44:51,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:44:51,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:51,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:44:51,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:52,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046165962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:52,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:52,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-08-21 12:44:52,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240200003] [2021-08-21 12:44:52,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:44:52,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:52,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:44:52,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:44:52,099 INFO L87 Difference]: Start difference. First operand 425975 states and 1972884 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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)